The complete measurer; or, The whole art of measuring .. (1789)
Hawney, William · London : Rivington · leaf 206
^otCi In the following Demonftration, 0 fignifiesany Circle in general ; and if any two Letters bejoined to it, thus, 0 AB, l^c. then it denotes theArea of fuch a Circle as thofe two Letters reprefentthe Radius of. Let Chap. 2. Menjuralion of Solids, 189 … Let DrrTS, the Axis of any Sphere; then, ac-cording to the Property of a Circle, it wiil be ^ ~ that is,therefore For and { ,|D-—Tbx Tbrr Dab;2|Dx Tb—DTb-DiibD xTb— n aT. 4 D Ab-f- nTbziDaT {Eucl. 1. 47.) 5DxciT:r:neT. 6DxTfzrDyT. Hence it is evident, that the Series D aT, D eT,DyT, i^c. are in the…
Measurement · Geometry
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![An illustration from L'optique divisée en trois livres : ou, l'On démontre d'une maniere aisée tout ce qui regarde 1. la propagation & les proprietez de la lumiere. 2. La vision. 3. La figure & la disposition des verres qui servent à la perfefectionner [sic] (1682)](https://img.insideoutlibrary.com/img/200/ia-loptiquedivise00ango-318-34.webp)
