. Clinical bacteriology and haematology for practitioners. Bacteriology; Hematology. 6 CLINICAL BACTERIOLOGY AND H^MATOL®GY 3. A Steam sterilizer; oy a large kitchen steamer—this should be deep enough to contain a litre flask holding a funnel. 4. A large Bunsen burner or spirit-lamp. Bacteria and their spores are ubiquitous, and it is necessary to sterilize all vessels and other apparatus and all culture media before use. The methods which are adopted all depend upon the action of heat; chemical antiseptics are rarely used in the bacterio- logical laboratory for the sterilization of apparatus,
. Clinical bacteriology and haematology for practitioners. Bacteriology; Hematology. 6 CLINICAL BACTERIOLOGY AND H^MATOL®GY 3. A Steam sterilizer; oy a large kitchen steamer—this should be deep enough to contain a litre flask holding a funnel. 4. A large Bunsen burner or spirit-lamp. Bacteria and their spores are ubiquitous, and it is necessary to sterilize all vessels and other apparatus and all culture media before use. The methods which are adopted all depend upon the action of heat; chemical antiseptics are rarely used in the bacterio- logical laboratory for the sterilization of apparatus, for it would be difficult to remove them completely, and the traces which might remain would prevent the development of those germs which we. Fig. 6.—Hot-air Sterilizer. wished to cultivate. Two chief methods are in use, sterilization by dry heat and by steam; we exclude sterilization by steam under pressure, as this requires special and expensive apparatus, and is never absolutely necessary, though often convenient. Dry Heat is used to sterilize all glass vessels (flasks, Petri dishes, test-tubes, pipettes, etc.), cotton-wool, and metal instru- ments. The heat must be continued for at least half an hour, and must not fall below 150° C. as indicated by the thermometer. Another method, which is less reliable than the use of the ther- mometer, but which may be resorted to in an emergency, is to wrap the apparatus loosely in cotton-wool, and to proceed with the. 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 Emery, Walter d'Este. London, Lewis
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbacteri, bookyear1912
