THE AMERICAN 



MONTHLY 



MICROSCOPICAL JOURNAL. 



Vol. XIII. NOVEMBER, 1892. No. 11. 



CONTENTS. 



Diatomology- — Cunningham - 249 Bacteriology. — Bacterioidal 

 Diatoms of the Connecticut Forms in Tissues and Eggs of 



Shore.-IIL-TERRY - - - 253 | in sects. - Decolor i zing 

 Radiolana: Then- Life-Historv „ ... y^,.. ,/• 



and Their Classification (Illus- \ Bacillus Obtained from 



trated).- Carter . - . . 257 Sputum.— Bacterosis of the 

 The Analyzing Eye-Piece (lUus- Grape-vine ------- 267 



trated).— LiGHTON - - - - 260 Microscopical Societies.— 



The Practical Use of the Micro- 

 scope in Pharmacy. — Dohme 262 



San Francisco, Cal - - - - 268 

 New Publications. — The 



Microscopical Apparatus. 



Substitute for Glass for Covers Pharmacology of the Newer 



and Slides for the Microscope 267 Materia Medica. Davis - - 272 



DIATOMOLOOY. 



By K. M. CUNNINGHAM, 



MOBILE, ALA. 



All science may be said to be both evolutionary and progres- 

 sive, partaking somewhat of the nature of organized beings ; pass- 

 ing from the simple relation to the complex in structure onwards 

 without limit. This corollary is preliminary to an exposition 

 of its application to the science of the study of the Diatomaceas. 

 As far as the writer's experience has gone, one branch of science, 

 classed under botany and pursued almost exclusively with the 

 use of the microscope, has not had its aggregate field of w' ork 

 crystallized under the distinctive title of a science, but has 

 mostly been designated by some subordinate term. My object is 

 to show, or point out, the justice of grouping together all the allied 

 and auxiliarv researches and methods of study of tlie Diatomaceae 

 under the title of " diatomologv." which in its broader defini- 

 tion would mean to comprise all that appertains to the study of 

 diatoms in whatever manner undertaken. Therefore, accumu- 

 lated experience suggests that the Diatomaceae can become the 

 basis of one of the most impressive, instructive, and engaging 



