. A text-book of bacteriology, including the etiology and prevention of infective diseases and a short account of yeasts, and moulds, haematazoa, and psorosperms. Bacteriology. THE BACTERIOLOGICAL MICROSCOPE. 75 bacteriological microscope, with a cheap form of adjustment to the sub-stage condenser, at a total cost of about fifteen pounds. Method of Illumination.—Good daylight is the best for general work. The microscope should be placed near a window with a northern aspect. Direct sunlight should never be utilised, and the best light is that reflected from a white cloud. When daylight is not a
. A text-book of bacteriology, including the etiology and prevention of infective diseases and a short account of yeasts, and moulds, haematazoa, and psorosperms. Bacteriology. THE BACTERIOLOGICAL MICROSCOPE. 75 bacteriological microscope, with a cheap form of adjustment to the sub-stage condenser, at a total cost of about fifteen pounds. Method of Illumination.—Good daylight is the best for general work. The microscope should be placed near a window with a northern aspect. Direct sunlight should never be utilised, and the best light is that reflected from a white cloud. When daylight is not available good results can be obtained with either gas or a. Fig. 20.—Abbe's Condenser consteucted by Zeiss. paraifin lamp. In the author's laboratory the microscope lamps are fitted with Welsbach incandescent mantles. These have many advantages over an Argand burner or a paraffin lamp. A steady and beautifully white light is obtained, and the lamps are quickly lit, and require comparatively little attention. In using high powers and carefully focussing the sub-stage condenser, the image of the fabric of the mantle is embarrassing, and is an objection to this light for the most accurate observations, but in other resjjects, and i. 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 Crookshank, Edgar M. (Edgar March), 1858-1928. Philadelphia, W. B. Saunders
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Keywords: ., bookcentury1800, bookdecade1890, bookpublisherphila, bookyear1897
