Barrow, Isaac, 1630-1677, Child, J. M. (James Mark), tr · Chicago, London : The Open court publishing company · leaf 160
indeed states thatit has been of service to him •■repeatedly (and no wonder),yet he thinks that it is enough to mention it, andomits the proof, which may be obtained from whathas gone before without much difficulty. Even the figurehe gives is the worst possible to show the connection, as itinvolves… … Fig. 131A. the proof, which Barrow omits, may be given as follows,reference being made to the figure on the left-hand side. I40 BARROWS GEOMETRICAL LECTURES Let the curve VXY be such that, if EA produced meets itin Y, then always EA : AD = AY : R. Divide the arc EV intoan infinite number of parts…
Geometry
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