1893.] THE MICROSCOPE. 79 



tive,use the microscope stage for the sensitized plate. Either the 

 stage or the negative and light must be enclosed in a box so no light 

 will reach the sensitized plate excepting through the objective. 

 The microscope tube may be thrust through a hole in a thin par- 

 tition, with the stage in the dark room, when the plate may be ex- 

 posed and developed. 



Space will not allow a more detailed description. A person 

 evperienced in photography. 



See A. M. M. J., vol. x, page 276, for a short article. 



Ij6. Microphotographs. How are the miniature magni- 

 Jying-glasses with photo views made. — Holiday. 



See answer to query No. 155. 



After the photo is made and cut down, a melted glass bead is 

 cemented with balsam over the face of the picture. When hard, 

 the edges are ground to fit the holder. The spherical bead acts as 

 a lens. They are usually made in France or Switzerland, where 

 labor is cheap. 



I 57' Who will put me up a special mount of pygidium of 

 flea?— A. L. W. 



A. — Write to Eugene Bourgogne, 34 Rue du Cardinal-Le- 

 moine, Paris, France, and enclose a United States dollar bill in 

 registered letter. He will sell it to a broker for 95 or 98 cents. 

 Write to him in French if you can. There will be no duty on 

 the slide. 



CORRESPONDENCE. 



Rotifera. — Mr. H. S. Jennings, of Michigan University, is 

 studying the Michigan rotifers and would doubtless like to com- 

 municate with others who are interested therein. 



What Dr. Stowell has to say of the Microscope. — It 

 will be remembered that Dr. Stowell, who founded this periodi- 

 cal at Ann Arbor, in April, 1S81 , is editor and publisher of The 

 National Medical Review, at 1326 New York avenue, in this 

 city. That he looks kindly after his offspring w T ill appear from 

 the following extract from the Reviezv for May, though we regret 

 to notice that he does not always correctly remember the ages of 

 his children : 



" Our first literary offspring, The Microscope, now thirteen 

 years of age, appears in a new dress, precisely like that of its 

 younger brother, The Reviezv. This is of course, very proper, 

 as we now have a two-year-old at home and a thirteen-vear-old 

 in the charge of Prof. Smiley of this city. The Microscope starts 

 at volume 1, new series for 1893, and is especially devoted to the 

 needs of naturalists, physicians, and druggists. The subscription 

 price is one dollar a year. Address Chas. W. Smiley, Box 630, 

 Washington, D. C." 



