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An instrument has been invented in the Biological department of the University of Pennsylvania which promises to be of great importance in microscopic investigation. The new instrument is a giant microtome for cutting sections of animal and vegetable tissues, which have been imbedded in paraffine. The instrument was designed and constructed by Dr. Milton J. Greenman, assistant director of the Wis+++ Institute. The general plan of it is similar to the Ryder microtome, which is so much used at present in biological laboratories.
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