Carnegie Institute. Diploceras carnegii. Sheep Creek Albany Co. by. The cast steel frame follows along the bottom side of the osteotome. Those come laid in sand and a cast made in plaster and this was then sent to the moulds. It is about 2 1/2 "wide, about 1/2" Thick, rounded below and slightly hollow above. The osteotome can laid on it and held in place by thin strips of iron held by screws to the cast steel frame. In the same way the chevron are fastened to its below. When the upright support- rises come against the cast steel frame there is an offset thus: This cast steel frame get smaller and narrow under the tail and thicker under the sacrum and dorsals. Here it is nearly 4" wide at probably 2" thick. There is little attracting rim under the sacrum. Leg rims half round, side strips welded on holding strips short rim. Pelvic rim also half round. Ribs held by half round rim. In fact