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PLATE II.
Fig. 5. B. Pyocaneus.—Microscopic preparation from an agar culture. 24 hours'
growth at 38° C. isolated from 1/1000 C.C. of the effluent from the secondary coarse bed
(Series A) at Barking. X 1,000.
Figs. 6, 7 and 8. Deposit Crossness crude sewage.—50 c.c. of the raw sewage were
centrifugalised and a microscopic preparation made of the deposit. This was washed in acid,
then in water, and finally stained with methylene blue. it shows zooglœa-like masses of
cocci and chains of cocci (streptococci). [In the supplement to the second report it was
stated (page 5) that—"numerous preparations subsequently made show that either
cocci, or rods so short and rounded at their ends as to simulate cocci, predominate in
microscopic stained specimens made from sewage and effluents, and not, as might have been
imagined, distinct bacillary or rod-shaped forms."] x 1,000.