The Microscope 



AND ITS RELATION TO 



Medicine and Pharmacy. 



VOL. III. | 



WHOLE NO. 14 ] 



Ann Arbor, June, 1883. 



No. 2 



CONTENTS. 



Original Communications. 

 Amphipleura Pellucida by Central 



Light. By A. Y. Moore, M. D.... 

 Projecting Lanterns. By C. H. 



Stowell 51 



Abstracts. By Geo. A. Hendricks.. 53 

 Folia Carobae — Jacaranda Caroba. 



By Mrs. Louisa Reed Stowell 56 



Parrira Brava. By Carrie L. Barker 61 



49 



PAGE. 



A Parasite in the Re,d Blood Cor- 

 puscles of a Turtle. By W. H. 



Birchmore, M. D 62 



Microscopy in the L T niversity of 



Michigan. By C. H. Stowell 63 



Editorial Department 69 



Selections 71 



Items 90 



Reviews , 94 



($xi®ixuil $mnm\xnimtim\$, 



AMPHIPLEURA PELLUCIDA BY CENTRAL LIGHT. 



BY A. Y. MOORE, M. D. 



FROM an article by Mr. B. W. Thomas, in the last issue of this 

 journal, it would appear that the resolution of Am. Pellucida 

 had actually been accomplished; but I think that such a feat is 

 very far beyond the capabilities of any objective yet made, and 

 that we shall have to wait some time before lenses will be suffi- 

 ciently improved to do such a thing. In the article referred to, it is 

 stated that I claimed to have resolved this diatom by central light a 

 year ago, but I simply claimed to have done io with the mirror 

 central, well knowing at the time that the light entered the objective 

 very obliquely, as may be seen by referring to back numbers of 

 this journal. 



There are two ways of determining that the light is not central: 

 first, by looking down the tube into the objective, and secondly, by 

 the color of the image — in fact, by the chromatic correction of the 



