Modern instruments and methods of calculation : a handbook of the Napier Tercentenary Exhibition (1914)
Horsburg, E. M. (Ellice Martin), Napier Tercentenary Exhibition (1914 : Edinburgh, Scotalnd) · London : G. Bell · leaf 333
o points where z is a minimax, consists of twoellipses, the major axis of one of which coincides with the minor axis of theother. The models were made for the late Professor Chrystal to illustrate hislectures on equations. 304 SECTION I II. A Model of the Half-Twist Surface The twist surfaces, of…
