Microscopes and Accessories for the Microscope

Microscopes and Accessories for the Microscope

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1891 edition. Excerpt: ...VI). (Fig. 12.) The extreme care exercised in the construction of the micrometer adjustment of stands VI and VII renders them available for use with the highest dry powers. For immersion systems these stands cannot fairly be expected to be rigid enough, though, if particular care be taken even these lenses may be used in exceptional cases. Stands V, VI and VII cannot be subsequently fitted with rack and pinion adjustment in lieu of the draw-tube arrangement. All those who do wish to spend a certain sum in making a first purchase with the intention of later on adding an immersion lens without having to undergo any extra-expenses occasioned by deficiencies in the stand, are therefore strongly advised to select one of the larger stands, viz. at least IVb. The prices of stands do not include any optical or mechanical parts beyond those enumerated in the above specification. Suitable combinations are compiled at the end of the catalogue. No.!Marks When using a revolving nose-piece with these smaller stands a clamping ring (1. 5.--) will be found convenient; this prevents the tube from sliding down in consequence of the weight of the nose-piece and the objectives attached thereto. The sliding objective-changer No. 25 is notapplicable to stands VI and VII, owing to the small distance between the tube and the stage. 15 j Stand IX. Simple stand for laboratory and technical purposes. Plain large stage of 100mm (4") dia. with large aperture, which may be decreased if required by dropping in a diaphragm. Large plane and concave mirrors. Adjustment by rack and pinion, the construction of which still admits, however, of the use of medium powers (C, D). (Fig. 13.) 40--Recommended by Prof. Johne (Veterinary School, Dresden) for the detection of...show more

Product details

  • Paperback | 26 pages
  • 189 x 246 x 1mm | 68g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236777549
  • 9781236777546