Barrow, Isaac, 1630-1677, Child, J. M. (James Mark), tr · Chicago, London : The Open court publishing company · leaf 179
onof the parabola and that of the quadrature of the hyperbola. He is notquite satisfied with this result, but finally succeeds in § 20, Ex. 3. 158 BARROWS GEOMETRICAL LECTURES 9. Also it may be noted that, PMQ being produced, if FZis supposed to be equal to PQ, and ft</) to AQ ; then thespace… … Fig. 158. Fig. 159. 11. Hence again, the surface of the solid formed by therotation of the space ABD about the axis AD bears to thespace A DOB the ratio of the circumference of a circle toits radius; therefore, if one is known, the other becomesknown at the same time. Hence again one may measure…
Geometry
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