THE AMERICAN 
MONTHLY 
MICROSCOPICAL JOURNAL. 
Entered at the post-office as second-class matter. 
VOL. XXII, OCTOBER, 1901. NO,. 10, 
CONTENTS. 
Diatomaceae of Gage’s Pond, Topeka, and of Silver Lake. 
Neen eee ene eee eee ee ssdbLdvavasgddpesmns 263-267 
Disinfection Against Mosquitoes. Rosenaw oi eee cence 268-272 
Structure of Diatoms. Keeley 273-275 
Diatoms, The Food of Fishin Kansas. Curtis... 275-280 
NoTES BY SHILLINGTON ScCALES.—Preparing Small Marine 
Invertebrates ; Demonstrations of Microscopic Manipula- 
tions ; C. fdkets Slide-Leriding System...... 280-283 
MISSCELLANEOUS.—Edward Ward; Formalin as a Preserva- 
tive for Plants ... 283-286 
Diatomaceae of Gage’s Pond, Topeka, and of Silver Lake. 
GEO. H. CURTIS. 
Although the Diatomacez of the eastern United States 
have been pretty thoroughly investigated by several com- 
petent observers, I believe that little is known as to what 
forms exist in the West. With the exception of Thomas 
and Chase’s catalogue of the Diatomacew of Lake Mich- 
igan, which embraces 34 genera and 214 species, and my 
own catalogue of the Cincinnati forms, 42 genera and 972 
species, there are no investigations of western or central- 
western forms known to me. 
In company with Mr. Frank Patrick, I paid a visit to 
Gage’s pond, in the western suburbs of Topeka, about the 
middle of October. It was dug by Mr. Gage a number 
of years ago as a fish-pond and stoned up. I did not 
think of estimating its dimensions while there, but is 
