THE AMERICAN 



MONTHLY 



MICROSCOPICAL JOURNAL. 



Entered at the post-office as second-class matter. 

 VOL. XX. SEPTEMBER, 1899. NO. 9. 



CONTENTS. 



Teeth on the Isabella of the Blow Fly. Wesche. 



With Frontispiece 261-262 



Experiments in Feeding Some Insects with Cultures of 



Cholera Bacilli. Maddox 263-267 



Questions in Regard to the Diphtheria Bacillus. Veeder 268-274 



Detection of Blood by Means of the Guaiacum Reaction. 



Schaer 274-283 



Method of preparing Nucleated Blood in Bulk for Class 



Demonstration. Oertel 283-285 



MiCROSCOPicAi, Apparatus. — The Power Limit 285 



Microscopical Manipulation.— To cut Cells in Glass Slips; 



Paste for Tin; Ivory; Waterproof Paper 285-286 



BACTERIOLOGY. — Tuberculous Stain; Mosquitoes and Malaria; 



Staining Capsules 286-287 



Medical Microscopy.— Tumor 287-288 



Microscopical Societies.— Royal Microscopical Society, 288 



New Publications. — American Microscopical Society; 



Urinary Analysis 288-289 



Microscopical Notes — .Algae ; Objectives ; Preparations 290 



The Teeth on the Labellaof the Blow Fly. 



WALTER WESCHE. 

 WITH FRONTISPIECE. 



One of the most familiar objects that is mounted as a 

 slide for the microscope, is the proboscis of the Blow Fly 

 {Musca vomitoria). Probably the most modest collection 

 of objects contains a slide. It is used every day as a test 

 for low powers, for flatness of field and sharpness of out- 

 line, and even familiarity has not diminished our wonder 

 and admiration of this marvel of minute structure. But 

 in the vast majority of cases, if a microscopist is asked to 



