the vibration which he stated was caused by an impact, he climbed on top of the car and knocked the brake off and then started back down. At that moment, the cars made another impact which knocked him from the top of the car to the ground. He stated that it was an everyday experience for him, over a period of forty years railroad service, to hold onto the ladders and grabirons of boxcars and that he believed the cars had coupled when he felt the vibration caused from the first impact.


11
Defendant's Special Request No. 1 was as follows:


12
"Under the provisions of the Safety Appliance Act requiring that cars be equipped with couplers automatically coupling by impact, I charge you, Ladies and Gentlemen, that the word `impact' aspushed this cut back into the second cut of cars, then there would be no failure to couple on impact where the couple was made between the engine and the first cut of cars, but was not made between the first cut of cars and the second cut of cars."


13
In order to put the trial court in error for failing to charge as requested, the request must correctly state the applicable law. The jury could have concluded from the language in this request that plaintiff's entire case, as it related to the Federal Safety Appliance Act, turned on the question whether a proper coupling was made on the impact between the couplers on the engine and the first of the eight cars that were stored on the "Whiskey