Undoubtedly the ropst peifeot engine in the world is the heart, working as it does, steadily and without osaaation, from birth until death. To regulate the internal mechanism of man's anatomy,: to pump the life-blood through the various arteries, to keep an equal pulsation, to do all these and still remain fresh and sound are things that can only be performed by the most delicate and faultless of organs. The British Empire -has no fewer than 278,000,030 of these wonderful little engines, ready at a moment’s notice to spring forth and strain themselves to .tfie .last in defence of their well-lpycd country. In a word, the whole wealth and strength ' and happiness of the most powerful nation , nn- earth are centred in that throbbing mass which is only too willing to reap or to plough, to do or to (jio. ‘ Takep together, hi fact, it R exceedingly 'hard to realise t?nat a truly magnificent - forge they cofpqjatid. Yef tha difference between the sise of the motor itself and the actual work that it is able to perform is truly astounding. Considering all the incalculable number of deeds that are ’wrought, and thoughts that throughout each brajn. froip day to' day, l the total product o_c-thia comparatively -m-" *■:> '-s-littie short of marycUoa'g, known surgical expert, who has, during a lengthy study, examined some - '.four hundred human hearts, agrees with ’ all the best authorities that the life's core of a single individual averages ten ounces in weight, is five inches long, three and one-half inches wide, and two and one half.inches thick, _ ‘An ordinary person can, at a pinch, exert 3600 horse-power during a hard working-day of ejght l|oiire, .if ftoffp power ‘J is purely < scientific tern}, and means, when translated into every-day parlance, the foroa exerted to raise 33,000 pounds the height of one foot, in one second. Jt follows, therefore, that tho combined great British heart is capable of generating a power of 278,000,000 times 3,600, or 1,000,800,000,000 horse-power. Moreover, our gigantic heart weighs 173,750,000 pounds': its thickness placed end to end is 115,833,333 feet 4 inches, while its width is 81,083,333 feet 4 inches. 