. Modern microscopy; a handbook for beginners and students, combining. Microscopy. Microtomes : their Choice and Use 235 surfaces of ' rothguss' (an alloy of zinc and copper). The two heavy blocks of metal—0, the object-carrier, and K for the knife—have each five ivory points (three only are seen in the diagram), which slide upon the raised surfaces of the guides in an absolutely perfect manner. Obviously, as 0 is pushed up the incline so the object will be raised. The inclination of the tramway is 1 in 20, so that if the object-carrier is pushed up 1 milli- metre the object must be raised ^V
. Modern microscopy; a handbook for beginners and students, combining. Microscopy. Microtomes : their Choice and Use 235 surfaces of ' rothguss' (an alloy of zinc and copper). The two heavy blocks of metal—0, the object-carrier, and K for the knife—have each five ivory points (three only are seen in the diagram), which slide upon the raised surfaces of the guides in an absolutely perfect manner. Obviously, as 0 is pushed up the incline so the object will be raised. The inclination of the tramway is 1 in 20, so that if the object-carrier is pushed up 1 milli- metre the object must be raised ^V oi a millimetre, and the section cut will be of that thickness. To the upper. Fig. 60. surface of the central plate C, Fig. 60, a scale is fitted, reading directly by means of a vernier elevations of the object so small as 0"015 millimetre, or 15 /i; consequently the object-holder may be pushed up its tramway by hand for sections of this tenuity or thicker. For sections of this or, in fact, any thickness, it is best to use the micrometer screw. This screw is seen in situ to the right of Fig. 59. The working of this micrometer screw requires a little ex- planation. The whole of this apparatus fits into the tram- way, to which it may be fixed at any part by means of a milled-head screw below. The micrometer screw is fitted. 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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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmicroscopy, bookyear1
