i. I S .«^ A K \ 



THE AMERICAN ''''*^ 



MONTHLY 



MICROSCOPICAL JOURNAL 



Vol. Xni. NOVEMBER, 1892. No. 11. 



COJVTBJVTS. 



Diatomology. — Cunningham - 249 Bacteriology. — Bactericidal 



Diatoms of tlie Connecticut 

 Shore. — III. — Tkrry - - - 253 



Radiolnria : Their Life-History 

 and Their Classification (Illus- 



Forms in Tissues and Eggs of 

 Insects. — Decolorizing 

 Bacillus Obtained from 



trated).- Carter - - - -2571 Sputum. — Bacterosis of the 

 The Analyzing Eye-Piece (Illus- I Grape-vine ------- 267 



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

 The Practical Use of the Micro- g^^ Francisco, Cal - - - - 26S 



scope in Pharmacy. — Dohme 262 ^^ _, _, 



Microscopical Apparatus.- ^^^^ Publications. —The 



Substitute for Glass for Covers Pharmacology of the Newer 



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



DIATOMOLOGY. 



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 Diatomaceje. 

 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 work 

 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 auxiliary researches and methods of study of the Diatomaccce 

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

 tion w^ould mean to comprise all that appertains to the study of 

 diatoms in whatever manner undertaken. Therefore, accumu- 

 lated experience suggests that the Diatomaceaj can become the 

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



