THE AMERICAN 



MONTHLY 



MICROSCOPICAL JOURNAL. 



VOL. XIX. NOVEMBER, 1898. NO. II. 



Contents. 



The Double Microscope 189-202 



Curious Leueocytes..... 202-203 



Practical Suggestions. — Lake Erie Water, Cephalozia 

 SuUivautii, Physcomitrium immersum, Daplinella tucker- 



manii, Amphigastria 203-204 



Editorial. — Limitation, Bacteria in Ground Water, Quekett 



Club, Wasliington Society 205-206 



Science Gossip. — Imbedding Lichens, Photomicrography of 

 Opaque Objects, Quick Method of Preparing Sections, 

 Nematodes for Microtome Sections, Sectioning Bolitic Grains 206-208 

 Miscellaneous — Slides, For Sale, Personal, Desirable Slides 208 



The Double Microscope. 



It is now nearly a year since Professor Elmer Gates 

 announced his success in pliotoraicrograpliy with two mi- 

 croscopes placed end to end. A large amount of frothy 

 talk has emanated from a superanuated microscopical 

 editor against the plan, and the English authorities have 

 denounced the scheme. All these people have without 

 exception contented themselves with denunciation or 

 denial, and scorn to try even to repeat the experiments. 

 The absolute stupidity of refusing to try the arrange- 

 ment is laughable. Nq person has come forward to 

 say ; ''I have given Gates' plan a full, fair, and honest 

 trial and it is a failure for such and such reasons." Mean- 

 while the matter is taking shape. Some people who 

 have repeated the experiments have reported success, in- 

 cluding E. Gerber of the ISTew York Microscopical Society. 

 A business concern is now making a supply of micro- 

 scopes containing two objectives as directed by Professor 



