. Bacteriology and mycology of foods. Food. c/.s ^ Arthte;'^Thoi;nas;C!o i RMI^NTAIJPIO (ioR- AA± w '"i"''ttii ''""• mtmmmmmm. Fig. 15.—^Thoma-Levy Counting Chamber, guaranteed to be well within such Hmit of error as may be later established by the U. S. Bureau of Standards for instruments ojf this type. Application of Haemocytometer to the Enumeration of Bacteria. Since the samples which are used in the hsemocytometer are small, the bacteria must be present in large numbers. A slight error in making dilutions will cause a large error in the determination of the number of b
. Bacteriology and mycology of foods. Food. c/.s ^ Arthte;'^Thoi;nas;C!o i RMI^NTAIJPIO (ioR- AA± w '"i"''ttii ''""• mtmmmmmm. Fig. 15.—^Thoma-Levy Counting Chamber, guaranteed to be well within such Hmit of error as may be later established by the U. S. Bureau of Standards for instruments ojf this type. Application of Haemocytometer to the Enumeration of Bacteria. Since the samples which are used in the hsemocytometer are small, the bacteria must be present in large numbers. A slight error in making dilutions will cause a large error in the determination of the number of bacteria per cubic centimeter since the factor is large which converts the reading of the microscope into terms of cubic centimeters. It is also an easy matter to confuse organic matter with bacteria. This is especially true in the applications of this apparatus to the enumera- tion of bacteria in feces and tomato products. These are taken up in other places. Cleaning of Haemocytometer Apparatus. This is one of the most important essentials in the use. of the apparatus. Pipettes should be cleaned by attaching them to a suction pump and drawing dilute alkali through them. After this alcohol and distilled water may be used. If they become stopped up a small wire may be run through,. 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 Tanner, Fred Wilbur, 1888-1957. New York, John Wiley & Sons, Inc. ; [etc. ,etc. ]
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Keywords: ., bo, bookcentury1900, bookdecade1910, booksubjectfood, bookyear1919
