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Updated: May 7, 2025
It can also be applied to many polarizable objects. This quality, combined with the transmission of a greater amount of light than is obtainable by the polariscope, renders objects thus seen much more effective. It is constructed as follows: Into the tube of the spot lens a short tube is made to move freely and easily.
And in this case only the polariscope can show what chemistry cannot show when we reach the point of testing Senor Barrios's blood if that becomes necessary." It was plain that Kennedy was confident. "There are other sources of drugs of the nature used in this case to asphyxiate and kill, but the active principle of all is veratrine. The point is, veratrine from what source?
Thus the polariscope was found to have told the truth, though not the whole truth. The photograph so satisfactorily communicative was taken by Sir William Huggins on the night of June 24; and on the 29th, at Greenwich, the tell-tale Fraunhofer lines were perceived to interrupt the visible range of the spectrum.
If a piece of this mineral be placed over a word, the letters forming it will appear double. Iceland spar is used chiefly in the optical instrument known as the polariscope. Eider-down consists of the soft, fine feathers growing on the breast of the eider-duck, great numbers of which frequent the coast and lakes of Iceland.
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