Carpenter, William Benjamin, 1813-1885 · London : John Churchill · leaf 74
ACHROMATIC OBJECT-GLASSES. 51 Fir. … Section of an AchromaticObject-glass. tliree pairs of lenses, which surpassed anything of the samekind that had been previously executed. From that time, thesuperiority of the plan of combining three pairs of lenses(Fig. 8, I, 2, 3), which should be so adjusted as to correct eachothers errors, to…
Microscopy
Internet Archive · Medical Heritage Library · Public Domain Mark 1.0. Free to use for anything.
