Young, George, jr, Baxter, Hubert Eugene, joint author · New York, Macmillan · leaf 319
floor thickness 1 — 0; diameter of center support0 — 8; diameter of outside of chute 7 — 0; vertical height ofedge 0 — 9. Develop outer and inner helixes at \ scale. Developwell lining at i scale. Draw plan, elevation, and approximate de-velopment of ^ of one turn of the heUcoidal bottom at Ij… … ^ /
Geometry, Descriptive
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