THE AMERICAN 



V MONTHLY 



MICROSCOPICAL JOURNAL 



VOL. XX. JP^NU^RY, 1899. NO. 1. 



CONTENTS. 



On Diatom Structure, Nelson (Frontispiece)...: i-io 



On Some Micro Cements for Fluid Cells, Rousslett 10-17 



Microscopy by the General Practitioner, Sherman 17-25 



Editorial. — The Journal for 1899 25-26 



Letters to the Editor. — Gates' Double Microscope by Terry, 



Edwards, Gage, Mercer and Shanks. 26-28 



Microscopical Apparatus. — Ohmann's Camera, Jones' Ex- 

 celsior 28-29 



Microscopical Manipulation. — Frozen Sections, Urinary 



Sediment 29-30 



Bacteriology. — Tick Fever in Cattle, San Francisco Labora- 

 tory 30-31 



Biological Notes. — Nasal Tissue , 31 



Microscopical Societies.— St. Louis, New York 31-32 



New Publications. — Subconscious Self. 32 



On Diatom Structure. 



BY EDWARD M. NELSON, 



LONDON, ENGLAND. 



BEAD BEFORE THE QUEKETT CLUB. 



WITH FRONTISPIECE. 



As time progresses, fresh discoveries in diatom struc- 

 tures become more difficult, for the simple reason that 

 the larger or coarser structures have all been described 

 long ago, and only the finer and more delicate ones are 

 left. Among these, however, there is a good deal yet to 

 be done, even with our present appliances, and when fur- 

 ther optical improvements are effected there will be a 

 great deal more to do. For of this we may be certain, 

 that microscopes have by no means exhausted the details 

 of diatom structure, any more than telescopes have ex- 

 hausted the details of the solar system. 



