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 191
he rule to the other. It is an interesting fact that thispiece can be used as a cursor or runner. If this had been intended,the date of the actual introduction of the runner would be taken back 120 164 SECTION F years.1 The edges of this piece C are, however, not bevelled, as are the edgesof the… … Fig. 2.
