Carpenter, William Benjamin, 1813-1885 · London : John Churchill · leaf 139
ed by him the indicator.49. Camera Lucida.—Various contrivances may be adaptedto the eye-piece, in order to enable the observer to see theimage projected upon a surface whereon he may trace its out-lines. The one most generally employed is the CameraLucida prism contrived by Dr. Wollaston for the… … Microscope arranged with Camera Lucida for Dra\vlng or Micrometry. shown in Eig. 34, the rays which pass through the eye-piece into the prism, sustain such a total reflection from itsoblique surface, that they come to its upper horizontal surfaceat right angles to their previous diicction; and the…
Microscopy
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