-frv^^^ry 



THE AMERICA 



MONTHLY 



MICROSCOPICAL JOURNAL. 



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



VOL. XXI. JANUARY, 1900. NO. 1. 



CONTENTS. 



Multiple Color Illumination. With Frontispiece T-12 



Preserving as Permanent Specimens Casts Found in Urine 12-14 



Agar-Agar 14-19 



Photo Micrography with Opaque Objects 19-21 



Micrometry of Human Red Blood Corpuscle 21-22 



Occidental Sea Specimens 22-24 



A Kettle-hole in Newark, N. J 24-25 



Biological Notes. — Pammel. — Holdfastsof Certain Florideae ; 

 Compound Oospore of Albugo bliti ; Vibrioids in the Plant Cell ; 

 Indiana Plant Rusts ; Notes on Travel; Comparative Embry- 

 ology of Rubiaceae 25-28 



Microscopical Societies.— Washington ; Royal Microscopical 



Society ; Quekett Club ..:.; 28-30 



New Publications. — Moulds, Mildews and Mushrooms; Botany 30-31 



Microscopical Notes. — Card; Slides; Objects ; To Priuta Palm 32 



Multiple Color Illumination. 



JULIUS RHEINBERG. 



With Frontispiece. 



It is the natural desire of all who possess a microscope 

 to look at their objects to the best advantage. For those 

 who employ the microscope in the pursuit of science, it is 

 a necessity, and for those who use it as a pastime it is 

 equally pleasurable to know that they are seeing as much 

 as can be seen, given their peculiar object and their par- 

 ticular lenses. 



Now what is the secret of doing this ? It lies simply 

 in the mode of illumination, and I purpose, in this arti- 

 cle to treat of some comparatively new methods or illu- 



