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MICROSCOPIC PREPARATIONS OF THE NERVOUS SYSTEM. 



BY JOHN J. MASON, M. D., NEWPORT, R. I. 



PHOTO-MICROGRAPH NO. /O ^- ■^-*-i-t*^>>-tv- V^~~ /Sio. 



FRINTED IN INK BY THE ARTOTVPE PROCESS FROM NEGA TIVES TAKEN BY THE AUTHOR. 



