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PLATE V.
Fig. 17—B. subtilissimus. Impression preparation
from a gelatine plate culture x 1,000.
Fig. 18—B. subtilissimus. Gelatine " streak " cultures,
24 hours' growth at 20° C., natural size.
Fig. 19—B. subtilis. Sewage variety B. Gelatine
" stab " cultures, about natural size—
(a) One day's growth at 20° C.
(b) Three days' growth at 20° C.
Fig. 20—B. subtilis. Sewage variety B. Oblique agar
culture, 3 days' growth at 20° C., about natural
size.