. A practical treatise on the use of the microscope, including the different methods of preparing and examining animal, vegetable, and mineral structures. Microscopes; Microscopy. I I Fig. 224. shaped piece of steel may be pressed firmly into any of them by the spring, a, with which it is connected; this contrivance answers two purposes, one as a micrometer for determining how high the cylinder must be raised to cut the finest section, and the other for preventing the screw from being moved. A strong brass frame, of the shape shown in the upper part of the figure, and of nearly the same thickn
. A practical treatise on the use of the microscope, including the different methods of preparing and examining animal, vegetable, and mineral structures. Microscopes; Microscopy. I I Fig. 224. shaped piece of steel may be pressed firmly into any of them by the spring, a, with which it is connected; this contrivance answers two purposes, one as a micrometer for determining how high the cylinder must be raised to cut the finest section, and the other for preventing the screw from being moved. A strong brass frame, of the shape shown in the upper part of the figure, and of nearly the same thickness as the table, has a knife, e, ground perfectly flat on its under surface, firmly fixed to it by two strong screws, d d; this frame, with its knife arranged in the manner seen in the figure, is made to slide backwards and forwards smoothly upon the upper surface of the table. The wood about to be cut is driven very tightly into the square hole, g, in the cylinder, yj and should be allowed to project about an eighth of an inch above it. The cylinder being replaced within the tube, c, it wiU be found that when the frame is pushed forwards the edge of the knife will pass obhquely over every part of the surface of the wood, and as. 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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Keywords: ., bookcentury1800, booksubjectmicroscopes, booksubjectmicroscopy
