. Pathological technique; a practical manual for workers in pathological histology and bacteriology. pathological work:it is simple and heavy in construction, and the paraffin block-holder is controlled by a ball-and-socket joint, requiring butone screw instead of three. It has been found very satisfac-tory in practical use. Paraffin Bath.—The best bath for keeping paraffin at aconstant temperature is a thermostat of suitable size withhot-water jacket, such as is used for growing cultures of HISTOLOGICAL METHODS. 25 bacteria. The paraffin is kept in it on shelves in glass dishesof various size
. Pathological technique; a practical manual for workers in pathological histology and bacteriology. pathological work:it is simple and heavy in construction, and the paraffin block-holder is controlled by a ball-and-socket joint, requiring butone screw instead of three. It has been found very satisfac-tory in practical use. Paraffin Bath.—The best bath for keeping paraffin at aconstant temperature is a thermostat of suitable size withhot-water jacket, such as is used for growing cultures of HISTOLOGICAL METHODS. 25 bacteria. The paraffin is kept in it on shelves in glass dishesof various sizes. The advantages of this method over theold way of using copper cups set into the top of a water-bath are that the paraffin is kept absolutely free from dust,each worker can have his own set of dishes, and the smallestbits of tissue can be readily found in them, because they aretransparent. A preliminary bath of soft paraffin is wholly unnecessary,and only prolongs the objectionable stage of heating. Theregulator should register only one or two degrees above themelting-point of the Fig. 6.—Minot rotary microtome (International Equipment Co., Cambridge, Mass.). Paraffin should be melted and decanted or filtered beforeuse, as it often contains foreign material. When hot, it runsthrough an ordinary filter without trouble. A hot-waterjacket to the funnel is not at all necessary. Centrifuge.—This instrument is of great use in obtainingquickly the sediment from various fluids, including blood andurine, and also for sedimenting and washing the red blood-corpuscles used in the Wassermann and Noguchi serumtests. The electrically run instruments manufactured by theInternational Equipment Co., of Cambridge, Mass., can behighly recommended as well made, durable, and easy run- 26 PA THOL O GICAL TE CHNIQ UE. ning. Size I, type B, with 8-tube, 50 head will be foundvery satisfactory.
Size: 1649px × 1516px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookidpath, booksubjectpathology
