The Microscope. 47' 



in disseminating the facts revealed by the microscope. We 

 welcome such a journal to our table, and call the attention of 

 our readers to its value. Some of the subjects in this number 

 are : Electrical illumination in microscopy; Some facts relating 

 to pollen tubes ; Proceedings; Miscellanea, etc. 



Mr. Geo. E. Davis says : " We have never found the so- 

 called instantaneous changers to enable more work to be done, 

 and we have even discarded the double nose-piece in ordinary 

 work." 



Mounting Fresh-water Alg,e. — " After trying all sorts of 

 media .... I came to the conclusion that none were so good as 

 plain water with the least addition of camphor water to pre- 

 vent fungoid growths." Also suggests to preserve the green 

 color (1) the use of water recently boiled and then closed up in 

 a flask to minimize the amount of air dissolved in it; (2) to put 

 the slide in the dark immediately after mounting. 



Dr. Allen Y. Moore's Slides. — Mr. J. Mayall, Jun., said 

 that Mr. A. Y. Moore had forwarded a slide of Am2)hipleura 

 pellucida which was worth remark. It looked as if the diatoms 

 had been burned on the cover-glass in the usual way, and that 

 then a coating of silver had been deposited upon them. The 

 object gave the strongest and best image with the vertical 

 illuminator that he had ever seen. He could not explain why 

 it was so without further examination ; but Mr. Powell had 

 brought a microscope for the purpose of showing it, so that the 

 Fellows would have an opportunity of examining it for them- 

 selves. Mr. Crisp said that the slide was no doubt mounted in 

 the way recently published by Mr. Moore, viz., by coating one 

 side with pure silver, increasing its visibility more than four 

 times. — Royal Mic. Journal. 



EXCHANGES. 



{Exchanges are inserted without charge. Subscribers having microscope apparatus for sale or 

 exchange can announce the same without charge. ) 



SEVERAL Photographic Instruments, list of photo California Views, on paper 5x8, or stereo, or 

 same on glass for magic lantern ; upwards of NX) oil, four-inch paintings of foreign scenes, for 

 lantern; to exchange for good microscope stand and accessories, slides, etc. 

 R. E. WOOD, St. Helena, Napa Co., California. 



WOULD like to exchange a 1-6 Objective, 168°, adjustable, for a lower power. 

 ■ A. Y. MOORE, 89 Prospect St., Cleveland, Ohio. 



QUEEN'S New Sub Stage Condenser, with dividing combination for high or low powers, and 

 three Caps, for sale or exchange. DR. A. C. STOKES, Trenton, N. J. 



