THE AMERICAN 
MONTHLY 
MICROSCOPICAL JOURNAL, 
Entered at the post-office as second-class matter. 
VOL. XXIII, MARCH, 1902, NO. 8, 
a 
CONTENTS. 
A Simple Means of Producing Micro-Photographs With an Or- 
dinary Gamera. Forgan we 49-52 
Professor Howard on Mosquitoes he 53-55 
Sectioning Stems and Leaves of Mosses. Best cial) SABASO 
Tuberculous Pericarditis 56-57 
A, Book tiger ey Bieroscope. ke ce 57-58 
NOTES BY SHILLINGTON SCALES.—Immersion Oilin Collapsible 
Tubes; Royal M. Society; Quekett M. Club; Abnormal 
Secondary Thickening in Climbing Plants; The Arrange- 
ment of Cilia on Paramecium ; New ObjectivesbyO.Himmler 58-65 
Notts By L. H. PAMMEL.—Spermatogenesis and Fecundation 
Of 65-66 
MICROSCOPICAL SOCIETIES.—Postal M. Society ; Quekett Sats 66-67 
MISCELLANEOUS.— Observing the Circulation of the Blood ; 
Stereo-Micro-Photography; Preparing Tissues for Photo- 
micrography ; Origin of Potato Tubers.. 67-71 
NEw PvusLIcATions.—Animal Life ; The Microscopy of the 
More Commonly Occurring Starches h lsasataeh eee 71-72 
— 
Micro-Photographs With an Ordinary Camera. 
By W. ForGAN. 
So far as is known, no description seems to have been 
published of any apparatus used for producing micro- 
photographs, except that used during the Franco-Prussian 
War, for copying on a very small scale newspapers and 
documents to be sent outside Paris by pigeons. It was an 
elaborate and excellent instrument for the purpose. The 
object now is to show how anyone in the possession of a 
camera may produce micro-photographs by means of a 
very simple accessory. Probably very few are interested 
now in looking at these small pictures ; and there are still 
fewer, it is believed, who know how to make them. When 
collodion was introduced by Mr. Scott Archer as the me- 
