. A practical treatise on the use of the microscope, including the different methods of preparing and examining animal, vegetable, and mineral structures. Microscopes; Microscopy. THE SIMPLE MICROSCOPE. 53 arm, /, nine inches long, provided at its free end, a, with a stout ring, ff, into which either a compound body may be screwed, as seen in fig. 32, or a lens, ^, set in a large cell may drop. The com- pound body, it will be seen, has also a rack and pinion mo- tion of one inch in extent for a fine ad- justment, and the body itself may be inclined at any angle by means of a swivel joint to th
. A practical treatise on the use of the microscope, including the different methods of preparing and examining animal, vegetable, and mineral structures. Microscopes; Microscopy. THE SIMPLE MICROSCOPE. 53 arm, /, nine inches long, provided at its free end, a, with a stout ring, ff, into which either a compound body may be screwed, as seen in fig. 32, or a lens, ^, set in a large cell may drop. The com- pound body, it will be seen, has also a rack and pinion mo- tion of one inch in extent for a fine ad- justment, and the body itself may be inclined at any angle by means of a swivel joint to the ring. This instrument is particularly useM for minute dissections carried on in large troughs imder water; and when the opera- tor wishes to view his dissection with a. Fig. 32. high power, he may remove the single lens under which he has been at work, and substitute for it the compound body, which is usually supplied with three eye-pieces, and an inch and two inch object-glass; but in no case is he required to move his dissection, as the compound body can be appKed to the same objects as the single lens. To make this instrument available for the general purposes of a com- pound microscope, it is provided with an oblong frame or box, open at the sides, and in the bottom of which is con- tained a mirror; the top of a box having a hole in it about an inch and a half in diameter, answers the purpose of a stage, and into it a pair of forceps, a frog plate, and other apparatus may be fitted, as into the stage of an ordinary compound microscope. To the ring, also, may be adapted a small arm, capable of carrying a Coddington or other lens of high Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Quekett, John, 1815-1861. London, H. Bailliere; [etc. , etc. ]
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