the arms much more than the legs, and in proof of this he states that “it is exceedingly rare that the leg is affected in the same degree by paralysis as the arm.” Dr. Joseph Workman, for many years Medical Superintendent of the Provincial Lunatic Asylum at Toronto, thus writes to me: “When you say that left-footedness is (only) as frequent as left-handedness, I am quite sure you are in error. I remember well, when I was a boy, observing the fact among labouring men engaged in what was called in Ireland ‘sodding’ potatoes, in ridges about five feet wide, instead of planting in drills, that in any given number of men, from four up to a dozen, right and left-footedness prevailed about equally. Each pair carrying up the work of a ridge required to be right and left-footed men. I am myself left-footed; and of eight brothers, I believe about four were left and four right-footed. Sir Charles Bell, in asserting that ‘no boy, unless he is left-handed, hops on the left foot,’ asserts far more than the fact. I believe every boy will hop on his _spade foot_; at least I do so, and I am not left-handed; and I instinctively do so because I dig with this foot.” Dr. Buchanan states that “in all adults who use the right hand in preference to the left--that is, in the great majority of mankind,--the muscles of the right side, as well as the bones and other organs of motion, are more highly developed than those on the left side;” and the predominance of the upper limb follows, as a rule, the previous development of the lower limb on the same side. The power of overcoming weight or resistance, and that of passively bearing weights, he assigns to opposite sides,--both naturally resulting from the centre of gravity lying on the right side. If such be the case, the great majority of mankind should instinctively use the same side in bearing a burden. A favourable opportunity occurred for testing this question. During a voyage of some days in one of the large steamboats on the Mississippi River, my attention was attracted by the deck-porters, who at every landing are employed in transporting the freight to and from the levee, and in supplying the vessel with cordwood. They constitute, as a class, the rudest representatives of unskilled labour, including both whites and negroes. For hours together they are to be seen going at a run to and from the lower deck of the vessel, carrying sacks of grain, bales, chests, or bundles of cordwood. Watching them closely, I observed that some gave the preference to the right and some to the left shoulder in bearing their burden; and this whether, as with bale and sack, they had it placed on their shoulders by others, or, as with cordwood, they took the load up themselves. Noting in separate columns the use of the right and left shoulder, and in the case of loading with cordwood the employment of the right and left hand, I found the difference did not amount to much more than 60 per cent. In one case I