Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 207
two instruments of the first class,one having a bar movement similar to that of Andrew Ross, theother a Jackson similar to Becks. The principal difference was thatthe foot was of the bent claw form. We have already seen thatby their invention of the vertical lever fine adjustment (tigs. 124 and126)… … Fig. 138.—E. and J. Bocks No. 1 stand.
Microscopy
Internet Archive · Wellesley College Library · Public Domain Mark 1.0. Free to use for anything.
