Fig. 2.—Streptococcus pyogenes, red blood corpuscles and pus cells in the pus from a case of empyaema. (× 1000 diams.) Fig. 3.—Cholera spirillum, from eight days’ agar culture, showing many involution forms. Flagella well stained. (× 1000.) Fig. 4.—Bacillus typhi abdominalis (typhoid bacillus), with well-stained flagella. Young agar cultivation. (× 1000.) Fig. 5.—Group of typhoid bacilli, in a section of spleen. (× 1000.) Fig. 7.—Preparation from young cultivation of Bacillus pestis (plague bacillus). Flagella well stained (× 1000.) Fig. 9.—Bacillus diphtheriae, from twenty-four hours’ culture. (× 1000.) Fig. 10.—Free edge of false membrane from case of diphtheria containing numerous diphtheria bacilli. (× 1000.) Fig. 11.—Bacillus tetani, with well-stained flagella. Twenty-four hours’ culture. (× 1000.) Fig. 12.—Scraping from a wound in a case of tetanus, showing several spore-bearing and a few non-spore-bearing tetanus bacilli. (× 1000.) Fig. 15.—Bacillus tuberculosis. Bacilli in a giant-cell in the human liver in a case of acute tuberculosis. (× 1000.) Fig. 16.—Bacillus leprae. Bacilli in endothelial cells of splenic tissue. (× 1000.) Fig. 19.—Amoebae in wall of dysenteric abscess of liver, from specimen kindly lent by Professor Greenfield. (× 1000.)
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