My first point, then, is that there is no such thing as a standard of proteid needed by the body. All that can be said is this, that if you take a man who has been fed on a certain quantity for such and such a time and then feed him on a certain other quantity, alterations in the physical condition will appear. But who can say whether these changes are attributable merely to a deficiency or to a previous excess? If "M.D." and his patients take excessive food they naturally get trouble from stored poisons when they reduce the quantity. But why put all the trouble down to present deficiency instead of to previous excess? To this I can find no satisfactory answer. If we have got our bodies into so hopeless a condition that we cannot use our God-given instincts, tastes and feelings in the first place, the wisdom of troubling much about the continuance of bodily life would be doubtful; and, in the second place, one would need most overwhelming signs of knowledge to substitute for them. But where are they? There is no agreement between those who have been taught physiology. On the one hand, "M.D." gives a proteid standard, now impossible to myself, and I believe to many others, for it would involve eating a nauseating quantity; and, on the other hand, another doctor, presumably acquainted with the same physiology, tells me I cannot eat too little, so long as I do not persistently violate true hunger and taste. Then another doctor gives quite a different standard, and a much lower one. If we discard our natural guides, which of the claimants to knowledge is to be followed, and is there any knowledge at all such as is claimed? Imagine what a mockery it would have been to give such a standard as that of "M.D." to the agricultural labourer about the middle of last century, a typical one with a large family, and one who worked as men do not work to-day, and had to rear his family on a few shillings a week. How could such a one have provided more than a fraction of what "M.D." says is necessary, either for himself or his children? The broad fact is, that all the hardest work of the world has always been done by those who get the least food. As one who has had some experience of labour, I doubt if the workers could have done so much if it had not been for a spare diet. Certain it is, that since they have more to eat, they are much less inclined to work. My contention, then, is that there is no fixed standard of proteid needed by the body, but that the quantity depends on the development that is in progress and is only discoverable by the natural guides of appetite and taste, ruled by reason and love of others. Moreover, I contend that even if there were such a standard as "M.D." says physiology has found, it obviously is not known.