us of the sphere which passes through fourconsecutive points of a curve is called the radius of sphericalcurvature. Note. In what follows we shall have frequent occasion 200 CURVES. to employ differential coefficients with respect to the arc; andwe shall for shortness write x ^ x, x &c. instead… … THE OSCULATING PLANE. 201 drawn through, p, q, r... perpendicular to the chords AByBC,CD..., and LP, MQP, NRQ... are the lines of intersection ofthe planes through p and q, q and r, r and s,.... The lines pi,qL are in the plane ABC, and perpendicular respectively toAB and BC; the lines qM, rM are…
Geometry, Analytic -- Solid
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