1900J MICROSCOPICAL JOURNAL. 305 



species, Eunotia major, with which to conduct the oxy- 

 gen reactions. 



I have sent to the N. Y. Microscopical Society a pre- 

 pared slide of the diatoms which have been my principal 

 source for study of the various motile characters and also 

 specimens of the decayed wood adapted to the purpose of 

 the demonstration. Wood of a similar character is wide- 

 ly distributed in the United States, and is easily accessi- 

 ble to any ones who seeks it. I also enclosed a slide con- 

 taining Eunotia diodon and having Navicula rhomboides 

 in profusion, upon which material in the living state I 

 have made studies of interest. This latter material is de- 

 rived from a natural spring 330 feet above the level of 

 Mobile Bay and in the freshly gathered state of the ma- 

 terial it was easy to isolate hundreds of minute Hydra 

 viridis, whose bodies were 3-100 inch long and tentacles 

 1-100 inch long. This was the first time in twenty year's 

 collecting in every character of waters that I had succeed- 

 ed in finding a specimen of Hydra. With this special 

 gathering, I was enabled to study many of the aspects of 

 movement, budding, capture of prey, etc., all of which 

 agreed with the well-known histories of the Hydra, from 

 the time of Trembley of Geneva, to the latest writers of 

 the day. 



Mobile, Alabama, June 5, 1897. 



A Few Notes on the Microscope in the Drug Store. 



I have on previous occasions brought before this asso- 

 ciation the subject of microscopy. It is not my purpose at 

 this time to enter again into the general consideration of 

 the study. I shall by demonstration rather than by use of 

 words illustrate a few of the many simple tests that can 

 be made with a cheap microscope. 



I desire to especially impress upon you that all of the 

 work of the pharmacist does not demand an expensive out- 

 fit nor require long and tedious training in order to use 



