11. A spheroid, or as it may be more pro-perly called, an ellipsoid, is a solid generatedby the revolution of a semi-ellipse about one THE DECORATOR S ASSISTANT. 13 of its diameters, which remains fixed, A B c D. t> … Obs.—There are two sorts of spheroids, prolate andoblate. The spheroid is called prolate when the revolutionis made about the transverse diameter (x b), and oblate.when it is made about the conjugate diameter (c d).(To be continued.) {Continued fro7n page 175, Vol. I.)64. Shell-lac as a Water…
Design · Decoration and ornament · Art
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