File:Bacteriology 17.png
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English: Illustration from 1911 Encyclopædia Britannica, article BACTERIOLOGY.
Fig. 17.—A plate-culture of a bacillus which had been exposed for a period of four hours behind a zinc stencil-plate, in which the letters C and B were cut. The light had to traverse a screen of water before passing through the C, and one of aesculin (which filters out the blue and violet rays) before passing the B. The plate was then incubated, and, as the figure shows, the bacteria on the C-shaped area were all killed, whereas they developed elsewhere on the plate (traces of the B are just visible to the right) and covered it with an opaque growth. (H. M. W.) |
| Date | |
| Source | Encyclopædia Britannica, 1911 |
| Author | Project Gutenberg Distributed Proofreaders |
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This image comes from the 13th edition of the Encyclopædia Britannica or earlier. The copyrights for that book have expired in the United States because the book was first published in the US with the publication occurring before January 1, 1929. As such, this image is in the public domain in the United States. |  |
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| current | 16:31, 18 November 2008 | | 837 × 746 (33 KB) | Keith Edkins (talk | contribs) | == Summary == {{Information |Description={{en|1=Illustration from 1911 Encyclopædia Britannica, article BACTERIOLOGY. Fig. 17.—A plate-culture of a bacillus which had been exposed for a period of four hours behind a zinc stencil-plate, in which the le |
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