THE AMERICAN 



MONTHLY 



MICROSCOPICAL JOURNAL. 



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



VOL. XX, NOVEMBER, 1899. NO, 11. 



CONTENTS. 



The North American Slime-Moulds. With Frontispice 321-330 



Preparation of Certain Special Media, Moore 330-332 



Evolution of Decay. Hart. Illustrated 333-344 



Miscellaneous Notes. — Cooke. — Cleaning Diatoms ; Pul- 

 verizing Rock ; Diatom Mounts ; Double Stain; Amoeba ; 

 Yeast Cultures ; Insect Preservation ; Sponges ; Plank- 

 ton Nets; Plankton Pump; Rubber Stoppers; Hardening; 



Holoscopic Eye-piece 345-348 



Biological Notes. — Pammel.-History of a Tuberculous Herd; 

 Bacterical Treatment of Sewage ; Capsule Bacilli in Nasal 

 Mucosa ; Distemper of Dogs ; Plant Protection from Bacteria 

 and Fungi 349*35° 



The North American Slime-Moulds. 



T. H. MACBRIDE'S NEW BOOK. 



With Frontispiece. 



Professor T. H. Macbride of the State University of Iowa 

 has made a descriptive list of all Myxomycetes hitherto 

 described from North America including- Central America 

 and the MacMillan Company of New York has brought 

 out in a nice octavo volume of 230 pages accompanied by 

 eighteen plates of which our frontispiece represents the 

 first. The explanation of the plate is as follows : 



Enteridium splendens. iEthalium, natural size, fig. 1 ; 



a spore X 1400,fig. 1, a ; capillitium of same X 420, fig. 1, b. 



Dictydiaethalium plumbeum. iEthalium, natural size, 



