The Microscope 



AND ITS RELATION TO 



Medicine and Pharmacy. 



yoLJ'^.._ » Ann Arbor, AugiiHt, 1882. No. 3 



WHOLE NO. 9. f 



CONTENTS. 



PAGE. 



Original Connmunieations. 

 The History of the Microscope. By 



J. W. Crumbaugh. M. D 65 



Studies with Micrometers. By C K. 



Wead, A. M 69 



The Staining of Nucleated Blood 



Corpuscles. By Allen Y. Moore, 



M. D 73 



A Mount for Low Powers. By R. 



N. Reynolds 76 



Society Proceedings 77 to 85 



TARE 



Correspondence. 

 Communication from Allen Y. Moore 85 

 Communication from Thad. S. Up de 



Graflf 85 



Communication from President 



Blackham 87 



Selections. 



Drawing on Gelatine 88 



An Eye Protector for use with the 



Monocular Microscope 88 



Editorial Department 91 to 95 



Reviews 95 



#rigiBJiI i®,0mmttBicati0BS» 



THE HISTORY OF THE MICROSCOPE AND ITS ACCES- 

 SORIES. 



BY J. W. CRUMBAUGH, M. D. 

 SECOND PAPER. 



TWO thousand years elapsed from the time of introduction into 

 Greece of philosophy and the revival of letters in Europe, and 

 with letters the cultivation of science. What had been accomplished 

 during this time I have just stated, and what a meagre morsel it is. 

 The following era, however, was productive of greater things. In 

 1575 Maurolychus, of Messina, published his great work, DeLunse 

 et Umbrae — the next one of any description relative to our subject. 

 Contemporaneously, Johannes Baptista Porta, of Naples, flourished. 

 He it was who first constructed a camera obscura, an account of 

 which he published when but fifteen years of age (1560) in his 

 " Majia Naturalis." He tells us of his experiments at showing 

 small figures on a white wall in a dark room by means of drawings 



