Schmall, Charles Nelson. [from old catalog] · New York, D. Van Nostrand company · leaf 272
Fig. 148. Discussion. — The curve begins at the pole [when ^ = 0, p = 0] and winds continaally around it, always receding from it. The radiusvector becomes infinite after an infinite number of spires have beendescribed. 210. The lituus. — In this curve, the square of the radiusvector varies… … Fig. 149. Discussion. -^ The curve begins at infinity and winds steadily aroundthe pole but never attains it. p = 0, /o - 00.1ld^<x>,p^ O.J The figure shows the curve for positive values of d. 211. General equation of a spiral. — This may obviously ^^^^i^*^^ p = /c . ^« ....... (1)…
Geometry, Analytic
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