THE AMERICAN 



MONTHLY 



MICROSCOPICAL JOURNAL 



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



VOL, XXI. JULY, 1900. NO, 7, 



CONTENTS . 



The Evolution of a New Diatom Find. — Cunningham 181-188 



Experiments to Determine the Cause and Dissemination of 



Texas Fever. — Salmon 199-203 



Biological NOTES — Pammel. — Centrosomes in Plants; Fungi; 

 and Humus ; Lea/ Scorch ; Red Color in Plants ; Fertilization; 

 Incandescent Light on Plants; Antipodal Cells; Diatoms; 

 On y gen a ; Fungus; Yeast; Cell-Membrane 188-192 



NoTES dy J. H. Cooke. — Water Bugs ; Illumination ; Media ; 

 Blood Crystals ; Haemoglobin ; Magnesium ; Diatoms ; Fish- 

 Teeth ; Fungi ; Dead Black ; Radiolaria ; Rotifers ; Moulds; 

 Realgar ; Diamonds ; Microtome ; Epidermis ; Metals 192-199 



Notes by Scales. — Botanical Slides ; Malaria ; Naids ; Num- 

 mulites ; Wood Sections ; Locust Disease; Liverpool Society; 

 Condenser; Embedding 204-209 



The Evolution of a New Diatom Find. 



K. M. CUNNINGHAM. 



In the career of all who become at some period of their 

 activity infatuated with the study of the diatoms there oc- 

 cur epochs in which some particular find may prove of a 

 more romantic character, than all preceeding researches. 

 It is an epoch of this character that I desire to place on 

 record before it loses its present interest. 



In the spring of the year 1896, I had occasion to ob- 

 serve the novelty of dredging the Mobile River in front 

 of the city wharves at Mobile, and on one of these occa- 

 sions, merely desiring to secure a souvenir of the ancient 

 debris that was being exhumed, (not having the diatoms 



