By minutely studying hands in the Hospital of Grenoble, Jouvin discovered and wrote out in a rectangle thirty-two different sizes of hands. He furthermore recognized five types—very broad, broad, medium, slender and very slender—each type being divided into two classes. As there were thirty-two sizes for each class, and five types altogether, this made three hundred and twenty different numbers of gloves, which proved more than requisite to the demands of the finest trade. The dies which Jouvin invented and perfected for cutting out these three hundred and twenty different gradations of gloves consisted of the calibre, or glove pattern, and the punch, or _emporte-pièce_, and were made of fine tempered steel blades fastened to a back of cast iron. In making the heavier grades of gloves, the die was struck with a ponderous mallet, cutting only one thickness at a time. By cutting only one piece in this way, the artisan avoided any holes in the skins which might have been made in killing the wild animal or in dressing the leather. The thumbs and gussets, or fourchettes—the strips inserted to form the sides of the fingers—were cut with separate dies from pieces not large enough for the body of the glove, thus utilizing nearly every scrap of the material. As the leather was first placed upon a block to receive the blows of the mallet, this grade of goods came to be called “block cut.” In “table cut” gloves, however, the leather was tranked out on a table and shaped for the size desired. Then, by means of a power press many pairs were cut at once. The nicest part of this process consists in getting the leather in proper shape. Different sizes may be cut with the same pattern by estimating accurately the elasticity of the leather. Jouvin’s calibre is the same by which—under many different systems, of course—all gloves are cut to-day. Jouvin also studied to determine what degrees of pressure the skin will withstand in different parts, in order that, in every case, just the right piece of material should be selected to produce the measurements desired. Expert knowledge of skins is equally important with proper use of utensils in producing an accurately fitting glove. In his work Jouvin sought the satisfaction of the scientist and the artist rather than any financial benefit which might have accrued to him from his remarkable system. When he had completed his invention, he hardly realized its pecuniary value; he took out a patent for France, but not for any foreign country. The immediate effect of his achievement was somewhat curious.