Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 379
348 PRACTICAL MICROSCOPY Ion- • length of chimney should be 7 inches. Chimney should be-lead black inside. This chimney serves four purposes : 1st, imageof tme s not distorted by stri/and specks common to ordmary … Fig. 2(.)4. lamp chimneys; 2nd, prevents reflexion from inner surface ofchimney, which causes a double image of flame ; 3rd, preventsscattered light in room ; 4th, is not readily broken ; slips can beeasily replaced.1 1 It is very important to remove the metal chimney after use, or at least not…
Microscopy
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