THE AMERICAN 
MONTHLY 
MICROSCOPICAL JOURNAL. 
Entered at the post-office as second-class matter. 
VOL. XXII... JANUARY, 1902, ... NO. 1, 
-— 
CONTENTS. 
Professor Rudolph Ludwig Karl Virchow. With Frontispiece 
Acker pe SG i) | Jo2 
Images of Diatom Structure. Stokes” Ta aa EE 3-7 
Note on Red Rain Dust. Karop.. ... phe 7-9 
Double Image Disks and Complementary Interference Go- 
ROOT, + a Se Ss 9-10 
NoTEs BY PAMMEL.—Bacterial Diseases of Plants; Nuclear Di- | 
vision in Fuligo Varians ; Pathogenic Aspergilli ; Botany Du-. 
ring tne Nineteenth Century; Fusarium Equinum; Cleisto- 
gamous Flowers; Scandinavian Botanical. Gardens; The | 
Anatomy of Chrysoma ; Milk of Wilmington and Platt’s 
Chlorides; Bacteria of Semi-Nesert Region ; Transmission of 
Tuberculosis Hae 
Norges By M. I. Cross.—Microscopes in Schools ; Focussing | 
Attachments to Photo-Micro. Cameras; A New Substage | 
ee IC eae 14-17 
NOTES BY SH1lliNGtoN ScALEs.—Quekett Microscopical Club ; 
Manchester Microscopical Society; C. Baker’s Engineering | 
Microscope; New ‘‘Diagnostic’’ Microscope in ‘‘Magnalium”’ ; 
Bausch and Lomb Microtomes; Mounting Web of Spider; R & 
J. Beck’s New 1-14th-Inch Oil Immersion Object BP ae Wy fo 
——= 
Professor Rudolph Ludwig Karl Virchow. 
GEO. N. ACKER, M. D. 
With Frontispiece. 
The distinguished german pathologist, seblinenoledist 
and politician completed his eightieth year on Sunday 
October 13, 1901. The great event. was celebrated in 
Berlin and most of the medical centers of the world on 
Saturday October 12. Virchow was born in Schivelbein, 
a small town in Pomerania in 1821. He was educated at 
the gymnasium, and graduated in medicine at the Univer- 
sity in that city in 1843. After graduation he undertook 
the study of pathology and soon became assistant to Fro- 
riep and prosector at the Charite. With his friend Rein- 
hardt, he founded, in 1847, the Archiv, which has become 
the most important medical periodical in the world and 
ever since has borne his name, Compelled in 1849, on 
