78 STAINING TECHNIQUE 
Chinese Ink Preparations. The organisms are mounted in Chinese 
ink and are unstained. Therein lies the special advantage of such a 
preparation. Under the microscope the organisms appear as trans- 
purent spots in a dark field. Before using, the ink should be sterilized 
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Fie. 31.—Types of Forceps for Use in Stainmg Mucroorganisms. 
A, Cornet Style; B, Two Types of Stewart Style, C, Type of Slide Forceps, 
because it may contain many bacteria. After the ink has dried 
examination may be made either with or without a cover glass. 
Dark Ground Illumination. By this method the bacteria are 
examined in the unstained condition. In order to be observable, the 
