A new and original treatise on the geometrical development of round and oval cones, with easy examples of their application : for the use of beginners and practical sheet iron and tin plate workers (1904)
Fuller, John, b. 1833 · New York : D. Williams · leaf 27
A B or base of the cone is, 18 X 3.1416 = 56.5488, and \r —=216.0332, or the number of de-grees of a 30-inch circle necessary to make the coneA B C, which proves it to be between funnel fashionand lantern-head. Dividing 216.0332 degrees by 60 de- 216.03320 r grees we get -?—$ = 3.0005, or three… … To Construct Ovals. In the study of the properties of an oval or ellipsemuch time and labor are involved, which few men canspare or are willing to devote after a days work. Toknow the ellipse one must inquire into the propertiesof an oblique section of a cylinder. In the follow-ing lessons treating…
Sheet-metal · Geometry, Descriptive
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