Schmall, Charles Nelson. [from old catalog] · New York, D. Van Nostrand company · leaf 269
e whose centeris at the pole, and whose radius is equal to the length of theradius vector at the end of the first revolution, i.e., the valueof p when 6 = 277. 207. The spiral of Archimedes. — This curve is the locusof a point whose radius vector bears a constant ratio to thevectorial angle. The… … Fig. 146. 6 0 IT I TT 9 3 1 TT 5 r etc. P 0 ^i 4 k TT /C -j-TT etc. HIGHER PLANE CURVES 253 From the table, a definite number of spires are readily con-structed. The measuring circle here is ABC, whose center isO and radius OC = 2 /ctt. Again, the spires, being every-where equally distant along the…
Geometry, Analytic
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