The First Industries
They can be grouped according to the material employed. Man used seven materials-wood, shell, stone (with bone and horn as subdivisions), clay, copper, bronze, and iron. Vegetable materials were at first of great service to him. The trees gave him pointed sticks suitable for use in digging the soil, dry leaves for his bed, branches as material for his hut, planks for furniture, bark for clothing, thorns to serve as fasteners for his clothing, handles for tools, maces and clubs for attack and defence, and, in America, some trees with particularly hard wood gave him cutting weapons and tools.