Barrow, Isaac, 1630-1677, Child, J. M. (James Mark), tr · Chicago, London : The Open court publishing company · leaf 81
my purpose is largely withBarrows work on the gradient of the tangent, I shall alwaysdraw the applied lines at right angles, as Barrow does; ex-cept in the few isolated cases where Barrow has intentionallydrawn them oblique. LECTURE V Further properties of curves. Tangents. Curves like theCycloid.… … Fig. 26. 2. Hence it may be taken as a general theorem thattangents cut one another between the applied lines drawnat right angles to AZ through the points of contact. 3. The angle PTM is greater than the angle XQN. 4. Applied lines nearer to the vertex (and therefore alsoany straight lines…
Geometry
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