File:EB1911 Infusoria - motile reaction of Paramecium.jpg

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English: Diagrammatic view of behaviour of the motile reaction of Paramecium after meeting a mechanical obstruction at A. (From G. N. Calkins after H. S. Jennings.) For clearness and simplicity the normal motion is supposed to be straight instead of spiral.
Date published 1911
Source “Infusoria,” Encyclopædia Britannica (11th ed.), v. 14, 1911, p. 560, fig. vi.
Author From Calkins’ Protozoa.
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(Reusing this file)
Public domain 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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current16:45, 14 August 2018Thumbnail for version as of 16:45, 14 August 2018891 × 432 (63 KB)Bob Burkhardt{{Information |description ={{en|1=Diagrammatic view of behaviour of the motile reaction of Paramecium after meeting a mechanical obstruction at A. (From G. N. Calkins after H. S. Jennings.) For clearness and simplicity the normal motion is supposed to be straight instead of spiral.}} |date =published 1911 |source =“Infusoria,” ''Encyclopædia Britannica'' (11th ed.), v. 14, 1911, p. 560, fig. vi. |author =From Calkins’ ''Protozoa''. |permission ={{PD-Britannica}} }...