Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 270
her magnifying power the de-tails of an object of which ageneral view has been obtained bymeans of a lower ; or to use thelower for the purpose of findinga minute object (such as a parti-cular diatom in the midst of aslideful) which we wish to sub-mit to higher amplification. Thiswas conveniently… … IG. 180.— Brookesnose-piece as madeby Swift. on a pivot. This is shown in fig- 1 English Mechanic, vol. xlvi. No. 1178, Measurement of Power, by E. If, Nelson. R 242 ACCESSORY APPARATUS The most generally useful of all nose-pieces now in use are therotating forms which enable one to carry two,…
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