The builder's dictionary, or, Gentleman and architect's companion : explaining not only the terms of art in all the several parts of architecture, but also containing the theory and practice of the various branches thereof ... : also necessary problems in arithmetic, geometry, mechanics, perspective, hydraulics, and other mathematical sciences : together with the quantities proportions, and prices of all kinds of materials used in building ... (1734)
Toms, W. H. (William Henry), ca. 1700-ca. 1750, Devoto, John, fl. 1719-1752 · London : Printed for A. Bettesworth and C. Hitch ..., and S. Austen ... · leaf 375
refpc^live Ordinate in For, according to the Proper-the EllipJiS ty of [he Circle, It is 1 I 1 flS X T^= D B« by the Property ot the EllipCis.and 2 n TC : NC ::Sx T^: D^^ • icis I 3 DTC : NC : : □ B« \ub,I. z 14I TC : N C: : 13d : ^^. 3 HenceConfeqn.That is 2 TC : iNC :: B^ : ^^DA : N» :: B^B :… … Therefore TS : N » :: Circle.,-Area : the Ellipjis Jreabm T S:N« :: D TS : TSXN«;whence it tbilows that DTS : Circles Area : :T SX N a : EUipJis Area. Confequently, as i is to .7S)4,lb is the Rcttangleor Productof the Tranverfe and ConjugateDiameter of any Ellipfis to itsArea. Hence it is eafy to…
Architecture · Building
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