“Industrial activities were of five kinds: (1) Going to nature for her bounty, the primary or exploiting arts and industries; (2) working-up materials for use, the secondary or intermediary arts and industries, called also shaping arts or manufactures; (3) transporting or traveling devices; (4) the mechanism of exchange; (5) the using-up or enjoyment of finished products, the ultimate arts and industries, or consumption. The products of one art or industry were often the material or apparatus of another, and many tools could be employed in more than one; for example, the flint arrow-head or blade could be used for both killing and skinning a buffalo. Some arts or industries were practiced by men, some by women, others by both sexes. They had their seasons and their etiquette, their ceremonies and their tabus. [Illustration: FIG. 13. (S. about 1–3.) Hammer-stones. Phillips Academy collection. These are from Flint Ridge, Ohio, and were made use of in the manufacture of turtlebacks and discs. ] “_Stone-craft._—This embraces all the operations, tools, and apparatus employed in gathering and quarrying minerals and working them into paints, tools, implements, and utensils, or into ornaments and sculptures, from the rudest to such as exhibit the best expressions in fine art. Another branch is the gathering of stone for building. “_Water industry._—This includes activities and inventions concerned in finding, carrying, storing, and heating water, and in irrigation; also, far more important than any of these, the making of vessels for plying on the water, which was the mother of many arts. The absence of the larger beasts of burden and the accommodating waterways together stimulated the perfecting of various boats to suit particular regions. “_Earth-work._—To this belong gathering, carrying, and using the soil for construction purposes, excavating cellars, building sod- and snow-houses, and digging ditches. The Arctic permanent houses were made of earth and sod, the temporary ones of snow cut in blocks, which were laid in spiral courses to form low domes. The Eskimo were especially ingenious in solving the mechanical problems presented by their environment of ice.... [Illustration: FIG. 14. Free-hand, or direct percussion. First step in shaping an implement from a boulder. Figs. 23, 28, and 29 to 33 are from the _American Anthropologist_, vol. IV, 1891—W. H. Holmes’s paper. ] “_Ceramic art._—This industry includes all operations in plastic materials. The Arctic tribes in the extreme North, which lack proper stone, kneaded with their fingers lumps of clay mixed with blood and hair into rude lamps and cooking-vessels, but in the zone of intense cold, besides the ruder forms there was no pottery....