Machinery and processes of the industrial arts, and apparatus of the exact sciences (1869)
Barnard, Frederick A. P. (Frederick Augustus Porter), 1809-1889 · Washington, Govt. print. off. · leaf 560
Double Microscope. … Nachets Triple Microscope. practical value to the double microscope when used for purposes ofinstruction; and to those who observe merely for the satisfaction of curi- 544 PAEIS UNIVERSAL EXPOSITION. osity they add very niuch to the interest of the observation, and theattending gratification. These…
Machinery · Scientific apparatus and instruments
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
