The Microscope. 



217 



The mechanical and optical construction of the lantern microscope, 

 includinoj an exhibition of a number of beautiful objects by means 

 of this instrument. 



Mr. Doherty's long experience and well-known skill in practical 

 and theoretical microscopy need not here be referred to. We 

 hope that secretaries of Societies will avail themselves of this oppor- 

 tunity and communicate at once with Mr. Doherty, at 19 Blossom 

 Ave., Manchestei', England. A small fee will be charged for these 

 'demonstrations. 



Acknowledgments. — From the Palmer Slide Co., Smith's High 

 Eefractive Mounting Medium, index 1.8, of which we shall have 

 more to say at some future time; from Dr. Geo. H. Taylor, Mobile, 

 Ala., cleaned Pensacola Bay diatoms; from Mr. B. F. Quimby, 

 Chicago, ni., a mounting box, the utility and beauty of which merit 

 and will receive a careful description. 



TECHNOLOGY 



IMPROVED SETTLING TUBE FOR URINARY DEPOSITS. 

 Mr. F. Vanderpoel contributes to the Aynerican Monthly Mi- 

 ■croscopical Journal, a description of a device which will be found 

 useful to the general microscopist as well as physicians. 



The first two of the figui'es, 1 and 2, represent the tube as 

 originally devised ; 1 denoting the tube with movable cap secured 

 to it by means of a rubber band, and 2 the tube with a ground-glass 

 cap and stop-cock. The first departure from these forms is shown 



