Handbook of practical botany for the botanical laboratory and private student (1908)
Strasburger, Eduard, 1844-1912, Hillhouse, William, 1850-1910 · London, S. Sonnenschein; New York, Macmillan · leaf 30
liquid is in general oil, or amixture of oils. The homogeneous immersion objectives aredearer, less readily cleaned after use, and must be used onlywith the special fluid for which they are manufactured ; buton the other hand they transmit more light, bear a strongereye-piece, and, within certain… … Fig. 1.—Objective with collar for correcting for thickness of cover-glass (Zeiss). light-rays pass through after leaving the object. To pro-vide for this, they are usually manufactured also withcorrection collar, for use according to the thickness of thecover-glass, and at a somewhat increased…
Botany · Plant physiology · Microscopy
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