MR. JUSTICE WHITE delivered the opinion of the Court.This is a private treble damage action under the antitrust laws. [Footnote 1]  Continental Ore Company, a partnership, Page 370 U. S. 692 and its individual partners, who were plaintiffs in the trial court, are petitioners here. [Footnote 2]  Henry J. Leir, the principal party in Continental, had engaged in the buying and selling of metals, including vanadium products, in Europe prior to 1938, in which year he immigrated to the United States.  This case concerns his subsequent efforts in this country to build a successful business in the production and sale of vanadium.Vanadium is a metal obtained from certain ores which, in this country, are mined principally on the Colorado plateau.  The ore is processed at mills near the mines into a substance commonly known as vanadium oxide.  The oxide is then transported to the East and converted into ferrovanadium, [Footnote 3] which is purchased chiefly by steel companies for use as an alloy in hardening steels.The defendants named in the complaint were Vanadium Corporation of America (VCA), a fully integrated miner and manufacturer of vanadium products, Union Carbide and Carbon Corporation (Carbide), and the following four wholly owned subsidiary corporations of the latter company:  United States Vanadium Corporation (USV), engaged in mining vanadium ore and processing vanadium oxide; Electro Metallurgical Company (Electro Met), engaged in making ferrovanadium; Electro Metallurgical Sales Corporation (Electro Met Sales), engaged in the sale of vanadium oxide and ferrovanadium; and Electro Metallurgical Company of Canada, Ltd. (Electro Met of Canada), engaged in selling vanadium products in Canada.  The complaint was filed on November 15, Page 370 U. S. 693 1949, and service was had on VCA, Carbide and USV.  There was no service on Electro Met, Electro Met Sales, or Electro Met of Canada.  Carbide acquired the assets of Electro Met and Electro Met Sales by dissolution or merger during the year 1949, prior to the filing of the complaint herein.The complaint alleged that, beginning in about 1933, the defendants and others acting in concert with them violated §§ 1 and 2 of the Sherman Act [Footnote 4] by conspiring to restrain, by monopolizing, and by attempting and conspiring to monopolize trade and commerce in ferrovanadium and vanadium oxide.  The defendants were charged with purchasing and acquiring control over substantially all accessible vanadium-bearing ore deposits in the United States and substantially all vanadium oxide produced by others in the United States, with refusing to sell vanadium oxide to other potential producers of ferrovanadium, including Continental and its associates, with apportioning and dividing sales of ferrovanadium and vanadium oxide among themselves in certain proportions, with fixing identical prices for the sale of ferrovanadium and vanadium oxide and for the purchase of ore, and with making certain mutual arrangements whereby one or more Carbide subsidiaries supplied VCA with substantial quantities of vanadium oxide at preferential prices to VCA.  The complaint stated that, between 1933 and 1949, the defendants produced over Page 370 U. S. 694 99% of all ferrovanadium and over 90% of all vanadium oxide produced in the United States, and that, during the same period, the defendants sold over 99% of the ferrovanadium and vanadium oxide sold in this country. [Footnote 5]According to the complaint, as a proximate consequence of defendants' monopolistic and restrictive practices, independent producers and distributors of ferrovanadium and vanadium oxide, including Continental, were eliminated from the business.  Specifically, the complaint detailed several efforts which Continental made to enter and maintain itself in the vanadium business, all of which were allegedly frustrated by defendants' Sherman Act violations:  (1) In 1938, Continental negotiated a contract with Apex Smelting Company of Chicago whereby Apex was to build and operate a plant for the conversion of oxide to ferrovanadium by use of the aluminothermic process.  Continental and Apex were to share the profits of this venture.  On its part, Continental agreed to obtain raw materials for Apex and to sell the finished product.  Operations under this contract began in the spring of 1940, but Apex terminated the agreement in 1942, allegedly because the illegal activities of defendants prevented the obtaining of a sufficient supply of vanadium oxide.  (2) Meanwhile, Continental itself had begun to produce a compound called "Van-Ex," composed of vanadium oxide and other materials, which was designed for direct introduction into the steel-making process without prior conversion to ferrovanadium.  This venture was allegedly Page 370 U. S. 695 terminated in 1944 because of the difficulty of securing raw materials caused by defendants' unlawful practices, including the efforts of defendants to obtain ownership or control of the mines and mills of Continental's suppliers.  (3) Continental had developed a business with a Canadian customer during 1942.  When Electro Met Sales of Canada was appointed by the Canadian Government as the exclusive wartime agent to purchase and allocate vanadium for Canadian industries, that company, it is alleged, acting under the control and direction of its parent, Carbide, eliminated Continental entirely from the Canadian market and divided Continental's business solely between defendants.  (4) Defendants in 1943, by open threats of reprisals, allegedly frustrated certain arrangements which Continental had with the Climax Molybdenum Corporation for the manufacture of ferrovanadium.  (5) In January, 1944, Continental contracted with Imperial Paper & Color Corporation for the processing by the latter of vanadium oxide and ferrovanadium.  Continental agreed to act as sales agent for the output.  The complaint charged that Imperial abandoned the contract at the end of 1944 because of the inability to secure raw materials and that Continental then left the vanadium business altogether, all as a result of the restrictive and monopolistic practices of the defendants.Trial was to a jury, and a verdict was returned for defendants. Continental appealed, asserting error in the trial court's exclusion of various evidentiary items, in certain of the instructions given to the jury, in the refusal to give other instructions, and in other rulings of the trial court.  The Court of Appeals for the Ninth Circuit announced that its task was to review the correctness of the judgment below, not the reasons therefor, and, on that basis, affirmed the judgment, 289 F.2d 86, holding that there was insufficient evidence to justify a jury finding Page 370 U. S. 696 that defendants' illegal acts were in fact the cause of Continental's failure in the vanadium business, and hence, that a verdict for defendants should have been directed.  In reaching its decision, the court stated that it had considered not only all the evidence admitted by the trial judge, but also all the evidence offered by the plaintiffs which the trial judge excluded. The court did not deal with or rule upon any of the alleged trial errors relied upon by Continental, except for the issue relating to Continental's alleged exclusion from the Canadian market.  Certiorari was granted, limited to issues which required examination in the light of previous decisions of this Court and which presented important questions under the antitrust laws.  368 U. S. 886.  We have concluded, for the reasons discussed hereafter, that the Court of Appeals' decision must be reversed, and the case remanded for a new trial.IThe Court of Appeals was, of course, bound to view the evidence in the light most favorable to Continental, and to give it the benefit of all inferences which the evidence fairly supports, even though contrary inferences might reasonably be drawn. [Footnote 6]  From our examination of the Page 370 U. S. 697 rather extensive record, we have concluded that the Court of Appeals departed from this rule and erred in holding that there was insufficient evidence to support a finding that respondents' conduct in fact caused injury to Continental's business.Continental's fundamental claim throughout was that inadequate supplies of vanadium oxide were available to it and its associates, and that respondents' alleged Sherman Act violations caused or contributed to this shortage.  The Court of Appeals acknowledged the principle in antitrust cases that,"where the plaintiff proves a loss, and a violation by defendant of the antitrust laws of such a nature as to be likely to cause that type of loss, there are cases which say that the jury, as the trier of the facts, must be permitted to draw from this circumstantial evidence the inference that the necessary causal relation exists. [Footnote 7]"The court also assumed that the evidence was Page 370 U. S. 698 adequate to support a jury finding that respondents committed the alleged violations of the Sherman Act, and that the specific acts charged to have been done by respondents were performed as part of the basic plan to monopolize the vanadium market.  Nor did the court take express issue with the averments that adequate supplies of vanadium oxide were unavailable to Continental during certain periods, or with the argument that a shortage of vanadium oxide was the type of consequence that would reasonably be expected to flow from a conspiratorial and monopolistic arrangement controlling 99% of the ferrovanadium and vanadium oxide sold in this country.  The court nevertheless concluded, in effect, that before there could be a sufficient showing of any shortage of vanadium oxide, or at least before the jury could be permitted to infer that any such lack of material was chargeable to respondents, Continental was required to demonstrate both that it made timely demands for oxide from respondents and that it exhausted all other possible sources of that material.The court then examined seriatim the Apex, Van-Ex, Climax, Canadian and Imperial ventures, and ruled separately upon the respondents' alleged damage to Continental in connection with each of these episodes.  As to Apex and Imperial, it was said that Continental's demands for oxide from respondents were not sufficiently contemporaneous with the failure of these ventures to subject respondents to liability.  As to the Van-Ex period, respondents were blameless not because oxide had not been requested from them, but because Continental failed, in the court's view, to exhaust at least one other available source.  The Canadian and Climax issues were disposed of on different grounds.It is apparent from the foregoing that the Court of Appeals approached Continental's claims as if they were five completely separate and unrelated lawsuits.  We Page 370 U. S. 699 think this was improper.  In cases such as this, plaintiffs should be given the full benefit of their proof, without tightly compartmentalizing the various factual components and wiping the slate clean after scrutiny of each.". . .  [T]he character and effect of a conspiracy are not to be judged by dismembering it and viewing its separate parts, but only by looking at it as a whole.  United States v. Patten, 226 U. S. 525,  226 U. S. 544 . . . ; and in a case like the one before us, the duty of the jury was to look at the whole picture, and not merely at the individual figures in it."American Tobacco Co. v. United States, 147 F.2d 93, 106 (C.A.6th Cir.).  See Montague & Co. v. Lowry, 193 U. S. 38,  193 U. S. 45-46.Furthermore, we do not believe that respondents' liability under the antitrust laws can be measured by any rigid or mechanical formula requiring Continental both to demand materials from respondents and to exhaust all other sources of supply.  The Court of Appeals appears to have accorded no weight to Continental's evidence which was offered to show that respondents had interfered with, acquired, or destroyed the several small independent sources of vanadium oxide relied upon by Continental.  Under the criteria used by the Court of Appeals, respondents could, with impunity, concertedly refuse to deal with Continental while the latter was able to obtain some oxide from independent sources, then proceed at their leisure to dry up those other sources, and finally insist that Continental make repeated demands for respondents' oxide before incurring antitrust liability.  The cases relied upon by the Court of Appeals [Footnote 8] clearly do not support any such formula, and we cannot deem the injury Page 370 U. S. 700 alleged to flow from a monopolist's elimination of one's independent suppliers to be so "remote" as to justify refusing to let the damages issue go to the jury. [Footnote 9]Our review of the record discloses sufficient evidence for a jury to infer the necessary causal connection between respondents' antitrust violations and petitioners' injury.  In concluding that Continental and Apex had not made sufficient efforts to obtain vanadium oxide from respondents, the Court of Appeals either overlooked or interpreted into insignificance the repeated approaches made to respondents by Continental and Apex in July and October of 1939, in March and October of 1940, and in June and July of 1941.  The court also failed to notice certain communications from Apex in September and December, 1941, saying that it could operate at only partial capacity due to the lack of raw materials.  Nor did the court mention the testimony of an officer of Apex to the effect that Apex's supply of oxide was irregular and intermittent, and that the unavailability of oxide was one of the reasons that Apex did not operate at full capacity.  According to the Court of Appeals, the "critical period" during which Continental and Apex should have demanded materials from the respondents was the year preceding the termination of the Apex contract, which the court placed in June, 1942.  But it is quite plain from the record that Apex notified Continental of its determination to terminate the contract in January and February of 1942, which followed much more closely the previous refusals of respondents to deal with Continental and Apex.Undoubtedly, all of the evidence during this period does not point in one direction, and different inferences might reasonably be drawn from it.   There was, however, sufficient evidence to go to the jury, and it is the jury  Page 370 U. S. 701 which "weighs the contradictory evidence and inferences" and draws "the ultimate conclusion as to the facts."  Tennant v. Peoria & P.U. R. Co., 321 U. S. 29,  321 U. S. 35.During the so-called Van-Ex period, the court did not exculpate respondents because of petitioners' failure to request oxide from them, but because petitioners supposedly failed to take advantage of an independent source of supplies.  But the evidence relied upon by the court can just as reasonably be read in a manner favorable to Continental, and it appears that the court may have misapprehended significant parts of this record. [Footnote 10]  In any event, the interpretation and significance of this evidence were for the jury.The Court of Appeals also concluded that the respondents did not contribute to the failure of Imperial to produce ferrovanadium under its contract with Continental.  The court acknowledged, and there appears to be substantial evidence to this effect, that Imperial's decision was based upon its concern about a steady and reliable Page 370 U. S. 702 source of raw materials.  Continental had requested VCA and USV to provide sizable monthly supplies of oxide in November of 1943, but the Court of Appeals bracketed this evidence with the Van-Ex period even though the testimony clearly was that the supplies then sought were for the Imperial arrangement which was then being negotiated.  Imperial, after signing the contract, carefully surveyed foreign sources of vanadium, concluded they were inadequate, and determined not to go into production because a reliable, long-range source of oxide was not available.  In spite of the refusal of respondents to deal with Continental in November, 1943, and in previous months and years, and in spite of the assumed monopolistic control of almost all of the vanadium oxide in the United States, the court ruled that Continental must have requested oxide from respondents after the contract with Imperial was signed in January of 1944.  We think the jury should be allowed to determine whether respondents' conduct materially contributed to the failure of the Imperial venture, to Continental's damage.IIContinental's alleged elimination from the Canadian market raises different issues.  At the trial, Continental introduced evidence to show that, beginning in March, 1942, it had shipped Van-Ex to a Canadian customer each month during the remainder of that year.  There was then received in evidence a letter dated January 19, 1943, from Continental to Electro Met in New York City reciting that the new allocation system in Canada [Footnote 11] had eliminated Page 370 U. S. 703 Continental from the Canadian market in January, that Continental had inquired about the matter from the Metals Controller for the Canadian Government, and that the latter had referred Continental to Electro Met.  The court then struck this letter from the record and rejected petitioners' offer to prove that Continental was excluded from the Canadian market by Electro Met of Canada, a wholly owned subsidiary corporation of Carbide, acting as exclusive purchasing agent for the Metals Controller but allegedly operating in this connection under the control and direction of Carbide for the purpose of carrying out the overall conspiracy to restrain and monopolize the vanadium industry.  To that end, Continental offered to prove that its former share of the Canadian market was divided between Carbide and VCA.  Continental offered various correspondence with Electro Met of Canada and a memorandum and proposed testimony by Continental's vice president concerning his conversations with an employee of Electro Met who had communicated with Continental in response to Continental's letter of January 19, 1943, to Electro Met.  The court denied the entire offer of proof"for the reason that this is a transaction wholly in the hands of the Canadian Government, and that whether or not this plaintiff was permitted to sell his material to a customer in Canada was a matter wholly within the control of the Canadian Government. "Page 370 U. S. 704The Court of Appeals agreed with the trial court and concluded that Continental was not legally entitled to recover from respondents for the destruction of its Canadian business.  The court said that no vanadium oxide could be imported into Canada by anyone other than the Canadian Government's agent, Electro Met of Canada, which refused to purchase from the petitioners.  Thus, according to the court,"even if we assume that Electro Metallurgical Company of Canada, Ltd., acted for the purpose of entrenching the monopoly position of the defendants in the United States, it was acting as an arm of the Canadian Government, and we do not see how such efforts as appellants claim defendants took to persuade and influence the Canadian Government through its agent are within the purview of the Sherman Act."289 F.2d  at 94.  This ruling was erroneous, and we hold that Continental's offer of proof was relevant evidence of a violation of the Sherman Act as charged in the complaint, and was not inadmissible on the grounds stated by the courts below.Respondents say that American Banana Co. v. United Fruit Co., 213 U. S. 347, shields them from liability.  This Court there held that an antitrust plaintiff could not collect damages from a defendant who had allegedly influenced a foreign government to seize plaintiff's properties.  But, in the light of later cases in this Court, respondents' reliance upon American Banana is misplaced.  A conspiracy to monopolize or restrain the domestic or foreign commerce of the United States is not outside the reach of the Sherman Act just because part of the conduct complained of occurs in foreign countries.  United States v. American Tobacco Co., 221 U. S. 106; United States v. Pacific & Arctic R. & Navigation Co., 228 U. S. 87; Thomsen v. Cayser, 243 U. S. 66; United States v. Sisal Sales Corp., 274 U. S. 268.  Cf. Steele v. Bulova Watch Co., 344 U. S. 280; Branch v. Federal Trade Comm'n, 141 F.2d Page 370 U. S. 705 31 (C.A.7th Cir.).  See United States v. Aluminum Co. of America, 148 F.2d 416 (C.A.2d Cir.); United States v. National Lead Co., 63 F. Supp. 513 (D.C.S.D.N.Y.), aff'd, 332 U. S. 332 U.S. 319. [Footnote 12]Furthermore, in the Sisal case, supra, a combination entered into within the United States to monopolize an article of commerce produced abroad was held to violate the Sherman Act even though the defendants' control of that production was aided by discriminatory legislation of the foreign country which established an official agency as the sole buyer of the product from the producers and even though one of the defendants became the exclusive selling agent of that governmental authority.  Since the activities of the defendants had an impact within the United States and upon its foreign trade, American Banana was expressly held not to be controlling. [Footnote 13] Page 370 U. S. 706Olsen v. Smith, 195 U. S. 332; United States v. Rock Royal Co-op, 307 U. S. 533; and Parker v. Brown, 317 U. S. 341, do not help respondents.  These decisions, each of which sustained the validity of mandatory state or federal governmental regulations against a claim of antitrust illegality, are wide of the mark.  In the present case, petitioners do not question the validity of any action taken by the Canadian Government or by its Metals Controller.  Nor is there left in the case any question of the liability of the Canadian Government's agent, for Electro Met of Canada was not served.  What the petitioners here contend is that the respondents are liable for actions which they themselves jointly took, as part of their unlawful conspiracy, to influence or to direct the elimination of Continental from the Canadian market.  As in Sisal, the conspiracy was laid in the United States, was effectuated both here and abroad, and respondents are not insulated by the fact that their conspiracy involved some acts by the agent of a foreign government.From the evidence which petitioners offered, it appears that Continental complained to the Canadian Metals Controller that Continental had lost its Canadian business.  The Controller referred Continental to one of the respondents.  But there is no indication that the Controller or any other official within the structure of the Canadian Government approved or would have approved of joint efforts to monopolize the production and sale of vanadium, or directed that purchases from Continental be stopped.  The exclusion, Continental claims, resulted from the action of Electro Met of Canada, taken within the area of its discretionary powers granted by the Metals Controller and in concert with or under the direction of the respondents.  The offer of proof at least presented an issue for the jury's resolution as to whether the loss of Continental's Canadian business was occasioned by respondents' activities.  Respondents are afforded no Page 370 U. S. 707 defense from the fact that Electro Met of Canada, in carrying out the bare act of purchasing vanadium from respondents, rather than Continental, was acting in a manner permitted by Canadian law.  There is nothing to indicate that such law in any way compelled discriminatory purchasing, and it is well settled that acts which are in themselves legal lose that character when they become constituent elements of an unlawful scheme.  Swift & Co. v. United States, 196 U. S. 375,  196 U. S. 396; American Tobacco Co. v. United States, 328 U. S. 781,  328 U. S. 809; Steele v. Bulova Watch Co., 344 U. S. 280,  344 U. S. 287.  See Georgia v. Pennsylvania R. Co., 324 U. S. 439,  324 U. S. 457-458; Slick Airways v. American Airlines, 107 F. Supp. 199, 207 (D.C.N.J.).The case of Eastern Railroad Presidents Conf. v. Noerr Motor Freight, Inc., 365 U. S. 127, cited by the court below and much relied upon by respondents here, is plainly inapposite.  The Court there held not cognizable under the Sherman Act a complaint charging, in essence, that the defendants had engaged in a concerted publicity campaign to foster the adoption of laws and law enforcement practices inimical to plaintiffs' business.  Finding no basis for imputing to the Sherman Act a purpose to regulate political activity, a purpose which would have encountered serious constitutional barriers, the Court ruled the defendants' activities to be outside the ban of the Act "at least insofar as those activities comprised mere solicitation of governmental action with respect to the passage and enforcement of laws."  365 U.S. at  365 U. S. 138.  In this case, respondents' conduct is wholly dissimilar to that of the defendants in Noerr.  Respondents were engaged in private commercial activity, no element of which involved seeking to procure the passage or enforcement of laws.  To subject them to liability under the Sherman Act for eliminating a competitor from the Canadian market by exercise of the discretionary power Page 370 U. S. 708 conferred upon Electro Met of Canada by the Canadian Government would effectuate the purposes of the Sherman Act, and would not remotely infringe upon any of the constitutionally protected freedoms spoken of in Noerr.IIISince our decision concerning the alleged loss of Continental's Canadian business will in any event require a new trial of the entire case in view of the close interconnection between the Canadian and domestic issues, we shall remand the case to the District Court for further proceedings.  We therefore deem it appropriate to pass upon certain of the alleged trial errors raised by Continental in the Court of Appeals but not considered by that court.  In passing upon these issues, we are not to be understood as expressing any views on the merits of those matters raised by Continental before the Court of Appeals but not discussed here.An error committed by the trial court, perhaps understandable because the trial preceded this Court's decision in Klor's, Inc. v. Broadway-Hale Stores, Inc., 359 U. S. 207, was the "public injury" charge.  Although petitioners pleaded a concerted refusal to deal with them by respondents, a price-fixing conspiracy, and an allocation of customers, all per se violations under § 1 of the Sherman Act, the court charged the jury that a conspiracy must be proved "which was reasonably calculated to prejudice the public interest by unduly" restraining trade, and which was intended "to injure the general public by" restraining trade.  Under the rule stated in Klor's, this charge was error.The trial court also erred in its treatment of monopolization.  Initially, in its charge to the jury, the court defined "monopolize" as referring to"the joint acquisition or maintenance by the members of the conspiracy formed for that purpose, of the power to control and dominate Page 370 U. S. 709 interstate trade and commerce in a commodity to such an extent that they are able, as a group, to exclude actual or potential competitors from the field, accompanied with the intention and purpose to exercise such power."The court also related its definition of "attempt to monopolize" to action taken by a combination or conspiracy.  The jury was further instructed that"an essential element of the illegal monopoly or monopolization is the existence of a combination or conspiracy to acquire and maintain the power,"and that a verdict must be returned for the defendants "if you find that the plaintiffs have not proved that there was . . . a conspiracy."  Petitioners duly excepted to the charge on the ground that they were entitled to prevail if they could prove that either respondent monopolized unilaterally.Petitioners' complaint did not preclude reliance on unilateral monopolization, and the evidence offered was relevant and material to such a charge.  The trial court's misinterpretation of the law in defining "monopolization" and "attempted monopolization" in terms of "conspiracy to monopolize" was therefore prejudicial, rather than harmless.  This error should not be repeated in a new trial. [Footnote 14]The trial court further erred in its persistent exclusion of evidence relating to the pre-1938 period, on the ground that since Mr. Leir came to this country in 1938 nothing which transpired earlier could be relevant to his suit.  Petitioners sought to introduce evidence that the conspiracy and monopolization alleged began in the early 1930's, that overt acts in furtherance thereof Page 370 U. S. 710 occurred in the 1930's, and that it was pursuant to this anticompetitive scheme that respondents sought to and did eliminate petitioners from the vanadium industry after 1938.  This evidence was clearly material to petitioners' charge that there was a conspiracy and monopolization in existence when they came into the industry, and that they were eliminated in furtherance thereof. [Footnote 15]  We do not mean that a trial court may not place reasonable limits upon such evidence or set a reasonable cut-off date, evidence before which point is to be considered too remote to have sufficient probative value to justify burdening the record with it. [Footnote 16]  But that was not the basis for this exclusionary ruling.We conclude that the judgment of the Court of Appeals must be vacated, and the case remanded to the District Court for further proceedings consistent with this opinion.It is so ordered
U.S. Supreme CourtContinental Ore Co. v. Union Carbide Corp., 370 U.S. 690 (1962)Continental Ore Co. v. Union Carbide & Carbon Corp.No. 304Argued April 16-17, 1962Decided June 25, 1962370 U.S. 690SyllabusPetitioners sued respondents under § 4 of the Clayton Act to recover treble damages, alleging that respondents had violated §§ 1 and 2 of the Sherman Act by conspiring to restrain, by monopolizing, and by attempting and conspiring to monopolize, trade and commerce in ferrovanadium and vanadium oxide.  The jury brought in a verdict for respondents, and petitioners appealed, contending that the District Court erred in excluding various items of evidence, in giving certain instructions to the jury, in refusing to give other instructions, and in other rulings.  The Court of Appeals held that there was insufficient evidence to justify a jury's finding that respondents' illegal acts were the cause of petitioners' failure in the vanadium business and that, therefore, a verdict should have been directed for respondents.Held:  the judgment is vacated and the case is remanded for a new trial.  Pp.  370 U. S. 691-710.1. In concluding that there should have been a directed verdict for respondents, the Court of Appeals erred in failing to view the evidence in the light most favorable to petitioners and to give petitioners the benefit of all inferences which the evidence fairly supported, and it erred in holding that there was insufficient evidence to support a finding that respondents' conduct in fact caused injury to petitioners' business.  It was the jury's function to weigh the evidence and the inferences to be drawn therefrom, and to come to an ultimate conclusion as to the facts.  Pp.  370 U. S. 696-702.2. The District Court erred in rejecting petitioners' offer to prove that they had been excluded from the Canadian market by a wholly owned subsidiary of one of the respondents, which was acting as the exclusive purchasing agent for the wartime Office of Metals Controller of the Canadian Government, but which allegedly operated in this connection under the control and direction of its parent corporation for the purpose of carrying out the overall conspiracy to restrain and monopolize the vanadium industry in the United States.  This offer of proof was relevant evidence of a violation of the Sherman Act charged in the complaint, and it was not inadmissible on the ground that the subsidiary corporation was acting as an arm of the Canadian Government.  Pp.  370 U. S. 702-708. Page 370 U. S. 6913. The District Court committed several trial errors which should not be repeated in a new trial.  Pp.  370 U. S. 708-710.(a) The District Court erred in charging the jury that, in the context of the facts alleged in this case, a conspiracy must be proved "which was reasonably calculated to prejudice the public interest by unduly" restraining trade and which was intended "to injure the general public by" restraining trade.  P.  370 U. S. 708.(b) The District Court misinterpreted the law in defining "monopolization" and "attempted monopolization" in terms of "conspiracy to monopolize," and this error was prejudicial, rather than harmless.  Pp.  370 U. S. 708-709.(c) The District Court erred in its persistent exclusion of evidence relating to the period before petitioners' entrance into the industry, since this evidence was clearly material to petitioners' charge that there was a conspiracy and monopolization in existence when they came into the industry, and that they were eliminated in furtherance thereof.  Pp.  370 U. S. 709-710.289 F.2d 86, judgment vacated and case remanded for new trial.