Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 198
instruments, because for nearly forty years i1 haspractically remained the same. All its principal features werebrought to their present perfection nearly forty years ago, while allother microscopes during this period have been redesigned andmaterially altered over and overagain. This is nosmall… … THE HISTORY AND EVOLUTION OF THE MICROSCOPE majority of the microscopes of forty years ago are absolutely uselessfor the objectives of to-day, but the focussing- and stage movementsof Powell and Lealands microscope still hold the first place. Fig. 129 represents the instrument in its monocular…
Microscopy
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