It may be said that the simplicity of this branch of the mechanic arts does not require that degree of study and investigation which the more abstruse and complicated sciences demand, and hence there is no necessity for works upon the subject. This objection is only true in part. It requires the nicest adaptation of skill to make a perfectly fitting shoe or boot, and no man, unless he who is fully conversant with the rules and principles which enter into the preparation of the stock, the _correct_ measurement of the foot, the “cutting out” of the several parts of the stock, the lasting and fitting of the shoe or boot, can be successful in his profession. The making of an easy, elegantly fitting boot, requires a knowledge of the anatomy of the foot, a familiar acquaintance with the angles, lines and curves, which are involved in the perfect adjustment of part to part, and their relative positions. Most shoe manufacturers, and ordinary village shoemakers, learn their trades from their fathers, and the knowledge has been handed down from generation to generation, without change or improvement, and shoes are made to _fit lasts_, rather than the feet which are to wear them. Hence intelligent instinct has taken the place of intelligent knowledge, and progressive investigation. The workman knows nothing of the anatomy of the foot, the science of pattern cutting, and therefore works on as though all feet were cast in one mould, with the simple difference which the “sizes” indicate. These “sizes,” as is clearly shown in another portion of this work, are _regularly incorrect_. Hence, in the absence of a correct standard, the system of boot and shoe making is simply the following of established mechanical rules, upon a false foundation. We refer in these remarks to the manufacture of what is known as “sale work.” There are many, very many, “custom workers,” who proceed by correct rules, and upon scientific principles; men who understand how to _adapt the shoe or boot to the foot_, so that when the customer first draws the boot or shoe on, it fits naturally and easily, adapting itself to any, and every deformity or slight irregularity which the foot may present. We make general statements, which every intelligent shoemaker, or large manufacturer, will at once acknowledge. The whole trouble arises from the want of some correct standard by which to be guided in the preparation of the stock for the workman. All this cannot be gained but by study, patient investigation, and the _practical application_ of scientific rules. The French are generally acknowledged to understand the art of boot and shoe making better than those of any other nation, and they have carried the science to a degree of perfection not yet attained by ourselves, except in a few comparatively isolated cases. The whole secret of their success is their patient perseverance, and artistic skill in _understanding the rules which are vitally essential to success_.