Wood's Medical and Surgical Monographs . earing in the mass of gelatin schizo-phytic colonies presenting the customary form of anaerobiancolonies; sometimes these colonies are surmounted by a moreor less voluminous gaseous bubble. After fifteen days incu-bation the colonies, having become visible, are counted throughthe glass as if it were a question of bacteria hatched uponplates. When we desire to study the species born withoutair, it is necessary to sacrifice the tube; it will then be better 454 Bacteriological Analysis of Water, to reserve these instruments simply for the enumeration ofana
Wood's Medical and Surgical Monographs . earing in the mass of gelatin schizo-phytic colonies presenting the customary form of anaerobiancolonies; sometimes these colonies are surmounted by a moreor less voluminous gaseous bubble. After fifteen days incu-bation the colonies, having become visible, are counted throughthe glass as if it were a question of bacteria hatched uponplates. When we desire to study the species born withoutair, it is necessary to sacrifice the tube; it will then be better 454 Bacteriological Analysis of Water, to reserve these instruments simply for the enumeration ofanaerobics, and to emplo3 for their special study vessels whichI will describe later. In closing- this paragraph it remainsfor me to describe the refrigerating apparatus which I havehad made for my laboratory for the purpose of keeping thewater at a temperature of 0° C. As indicated by Fig. 13, this apparatus consists of twoboxes—the inner E intended for specimens which must bemaintained at 0° C, and the outer E serving- as an envelope. Fir. 13.—Refrigerating Apparatus for Low Temperatures. for the first. The inner, E, is m. in breadth, m. indepth, and m. in height; it communicates with the outerair by means of a passage furnished with two doors, P andP; the latter P is fitted to the external envelope. The refrigerating- box E rests upon a false bottom G,provided with openings in order to permit the flow of waterfrom the melting- ice; this escapes by the tube T; in this waythis melted water is prevented from coming- in contact withthe inner box. The box E designed to hold the ice, is m. wide, and m. high; it is surrounded by isolating felt,and a cover C with a double wall, in the interior of which isplaced sawdust or powdered charcoal; a thermometer Tpasses through this cover and penetrates into the inner box;it is protected by a metallic sheath. Bacteriological Analysis of Water. 455 When we wish to use the box, it is filled with pieces
Size: 1704px × 1466px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, bookpublishernewyork, bookyear18
