. Modern microscopy; a handbook for beginners and students, combining. Microscopy. 118 Modern Microscopy commercial glass troughs unfortunately do not meet these requirements. They are difficult to clean, they are in- variably hard to mend when broken, and they very often leak when water is put in. The one that we have found most serviceable is the Botterill's trough, as shown in Fig. 47, which consists of two vulcanite plates between which are placed slips of glass, which are separated by an india-rubber band, small bolts and screws passing through the whole to hold them together. This is not
. Modern microscopy; a handbook for beginners and students, combining. Microscopy. 118 Modern Microscopy commercial glass troughs unfortunately do not meet these requirements. They are difficult to clean, they are in- variably hard to mend when broken, and they very often leak when water is put in. The one that we have found most serviceable is the Botterill's trough, as shown in Fig. 47, which consists of two vulcanite plates between which are placed slips of glass, which are separated by an india-rubber band, small bolts and screws passing through the whole to hold them together. This is not an ideal trough, but it certainly answers its purpose as well as any at present made. Live-cages.—These are not used so largely for water objects as for insects, etc. They consist of a brass plate. Fig. 47.—Bottbkill's Trough. having a glass base-plate, over which a cap slides, having a very thin cover-glass. The subject to be viewed is placed between these two glasses and held firmly by compression. The best form is that designed by Mr. Eousselet, shown in Fig. 48, with which a condenser may be used conveniently. It is also so arranged that even if a specimen be fixed at the extreme edge of the glass plate, there is room for an objective to work on it. The ordinary live-cages are usually provided with a cover-glass too small in diameter for this to be done. A very good plan is often adopted by amateurs for viewing live objects as follows: A square, flat piece of glass is obtained, and on this an india-rubber ring is laid, into which the animalcule can be placed; a thin piece of glass is now put over the top of the india-rubber ring, and this really makes a very serviceable 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 Cross, M. I; Cole, Martin J. Chicago, W. T. Keener & Co.
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