[Illustration: Fig. 20—Primitive Agricultural Implements.] Although the Mound-builders, like all primitive peoples, drew freely on nature’s bounty for food supplies, such as hunting, fishing and gathering wild nuts, fruits, and roots, they had developed agriculture to a considerable degree. Tending their crops with rude Hoes made from clam shells (A) and shoulder blades of the deer (B), they produced corn, beans, squash, tobacco, etc. It is probable also that some of the burial mounds were built with the aid of such Hoes, which were used for loosening the soil and scraping it into baskets and carrying bags. THE USE OF BONE [Illustration: Fig. 21—Implements of Bone.] Next to Stone and Flint, the Mound-builders prized Bone for making implements and ornaments. Above (B, C) are shown two Bone Awls, which served for piercing leather and bark, and also as “tableware” in eating their meals. Other things made from bone were Harpoons and Arrowheads (A), Fish Hooks (D), Scrapers (F), Hoes, Needles (E), and Ornaments such as Beads and Pendants. With some of the Ohio Mound-builders and prehistoric Indians, Bone was almost as important as Flint and Stone, and was used for many different purposes. USE OF CLAY FOR POTTERY [Illustration: Fig. 22—Vessels of Burned Clay.] The Mound-builders and some of the Indians made their pots and pans out of clay, of which there is a great abundance in the river valleys of Ohio. They tempered or hardened the clay by mixing it with ground-up rock or shells, molded it into the desired shape, and baked the vessel in an open fire. Many of these ancient pots have designs like “B” and “C,” which were made with small sticks, or perhaps with pieces of flint or bone, before burning. In size, pottery vessels range all the way from that of a thimble to a bushel basket. They were used for the most part for cooking, storing and preserving food, but many of the highly decorated pots found in the mounds were probably made purposely as tributes to the dead. SPINNING AND WEAVING [Illustration: Fig. 23—Mound-builder Cloth.]