. Bacteria, especially as they are related to the economy of nature. Bacteriology. BACrEA'/A //V IVATEK 41 means of a sterilised rod stroked into a thin, even film all over the glass. It is then covered with a bell-jar and left at rest to set. The level stage prevents the gelatine running over the edge of the plate ; the iced water under the stage. A Moist Chamber in which Koch's Plates are Incubat expedites the setting of the gelatine into a fixed film. When it is thus set the plate is placed upon a small stand in a moist chamber, and the whole apparatus removed to the room temperature incuba
. Bacteria, especially as they are related to the economy of nature. Bacteriology. BACrEA'/A //V IVATEK 41 means of a sterilised rod stroked into a thin, even film all over the glass. It is then covered with a bell-jar and left at rest to set. The level stage prevents the gelatine running over the edge of the plate ; the iced water under the stage. A Moist Chamber in which Koch's Plates are Incubat expedites the setting of the gelatine into a fixed film. When it is thus set the plate is placed upon a small stand in a moist chamber, and the whole apparatus removed to the room temperature incubator. A moist chamber is a glass dish, in which some filter paper, soaked with corrosive sub- limate, is inserted, and the dish covered with a bell-jar. By this means the risks of pollution are minimized, and moisture maintained. In all cases at least two plates must be pre- pared of the same sample of water, and it is often advisable to make several. They may be made with difTerent media for different purposes, and with different quantities of water, though the same method of procedure is adopted. In a highly polluted water extremely small quantities would be taken, and, vice versa, in pure water a large quantity. When we come to discuss the relation of disease organ- isms to water, particularly those causing typhoid fever, we shall learn that they are both scarce and intermittent. This point has been dwelt upon frequently by Dr. Klein, and it is clear that such a state of things greatly enhances the diffi- culties in detecting such bacteria, and he has proposed a simple procedure by which the difificulty of finding the Bacillus typhosus in a large body of water may be 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 Newman, George, Sir, 1870- [from old catalog]. New York, G. P. Putnam's sons;
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishernewyorkgpputnamsso
