. The principles of bacteriology: a practical manual for students and physicians. Bacteriology. OS BACTERIOLOGY. present a thin cylindrical lining of gelatin or agar-agar, upon which the colonies develop. In all other respects the conditions for the growth of the organisms are the same as in flat plates. Esmarch directs that after completion of the dilutions the tops of the cotton plugs in the tubes should be cut oiF flush with the mouth of the test-tube and a rubber cap be placed over this. They are then to be held in the horizontal position and twisted between the flngers upon their long axe
. The principles of bacteriology: a practical manual for students and physicians. Bacteriology. OS BACTERIOLOGY. present a thin cylindrical lining of gelatin or agar-agar, upon which the colonies develop. In all other respects the conditions for the growth of the organisms are the same as in flat plates. Esmarch directs that after completion of the dilutions the tops of the cotton plugs in the tubes should be cut oiF flush with the mouth of the test-tube and a rubber cap be placed over this. They are then to be held in the horizontal position and twisted between the flngers upon their long axes under ice-water. The gelatin be- comes solidified thereby and adheres to the sides of the tube. When the gelatin is quite hard the tubes are removed from the water, wiped dry, the rubber caps removed, and they are set aside for observation. Fig. For some time past we have deviated from the direc- tions given by v. Esmarch for this part of his method. Instead of rolling the tubes under ice-water, we roll them upon a block of ice (Fig. 15). In this method a small block of ice only is needed. It is arranged nearly. 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 Abbott, Alexander Crever, 1860-1935. Philadelphia, Lea Brothers & Co.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectbacteri, bookyear1892
