Product Description
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1891 Excerpt: ...of meeting the growing demand for a low-priced ar.icle capable of satisfactory service. Amongst others, Messrs. F. D.irtoc k Co. offer several tempting lines. They will supply a microscope that will perform well on objects much more difficult than those included in the new syllabus at as low a price as half a guinea. But it is well not to limit one's-self to immediate necessities in purchasing apparatus, and, as the use of the microsoope is likely to grow, the student will find it advisable to procure one of their better instruments. Their " Student's Microscope " (shown above), with two English objectives (1 inch and J inch), sliding draw-tube and fine adjustment, glass stage, and a condenser, is supplied complete, in a polished mahogany cabinet, for 51. With rack-work to coarse adjustment extra, the price is 11. more. As an alternative, they offer a "Histological Microscope," with Jinch and i-inch objectives and two eye-pieces for the same amounts, either with or without the rack-work to coarse adjustment. The objectives, of course, form the most important part of the apparatus, and those of Messrs. Darton are really good. I have well tested the J-inch and J-inch with some exceptionally fine botanical sections, and tound them in every way satisfactory for students' use. The methods of manipulating the instrument are best learned from a friend, or a capital explanation may be found in Holmes's " Botanical Note-book." The light from a small flat-wick paraffin-lamp will be found most convenient to work by. Place the lamp to the left hand of the microscope, and practise manipulating the mirror until you have mastered the art of illuminating the whole field of view equally. Afterwards test the various adjustments. Place a «na...
Chemist and druggist
Product Details
- Published on: 2012-05-22
- Original language: English
- Number of items: 1
- Dimensions: 9.53" h x 7.32" w x 2.20" l, 4.37 pounds
- Binding: Paperback
- 1136 pages
Chemist and druggist
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