THE AMERICAN 



MONTHLY 



MICROSCOPICAL JOURNAL 



Entered at the post-office as second-class matter. 



VOL. XXI. AUGUST, 1900. NO. 8. 



CONTENTS. 



Rogers' Compressor. Frontispiece 211 



The Radiolaria. Edwards 211-217 



Life in the Great Salt Lake. Talmage. 217-224 



Peridinieae. Edwards 224-226 



Notes by Shii^ingTon Scales. — Postal Society ; Preserving 

 and mounting Rotifers ; Baker's Microscopes ; Ova of Lepi- 

 doptera ; Adjustment; Mounting ; Slips ; Dry Mounting; 

 Cells ; Richmond Park Ponds ; Manchester Society ; Spiders 



Wanted. _ 226-236 



Microscopical Notes. — The Great Salt Lake ; Inspection of 



Pork 237-239 



The Radiolaria. 



ARTHUR M. EDWARDS, M. D., F.L.S. 



I do not see why the Bacillaria or the Diatomaceae, or in 

 fact the diatoms, should claim so much of the notice of 

 microscopists to the exclusion of other minute atomies. 

 Perhaps they are more beautiful and perhaps it is the fact 

 that they are, especially Pleurosigma angulatum, used as 

 test objects for all microscope objectives of powers higher 

 than an inch. 



The Radiolaria claim a place at least in the cabinet of 

 the microscopist, and I shall endeavor herein to establish 

 their claim to furnishing a knowledge of the sarcode 

 which forms as great a place in their composition as the pro- 



