THE AMERICAN 



MONTHLY 



MICROSCOPICAL JOURNAL 



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



VOL. XX. . AUGUST, 1899. NO. 8. 



CONTENTS. 



Marine Microscopic Organisms Harris, Illustrated 231-237 



Merits of Dffferent Objectives Tyrrell 237-238 



Making Plate and Esniarch Roll Cultures, Moore 238-241 



On Red Mites Found in Fresh-water Soar 241-243 



Recent Work in Clinical Microscopy Pyfkogel 244-247 



Notes on Embedding, Glass, Mites, Labels, Tracing paper, 



Working Rocks, Mounts, Pointer, Alcohol, Honey-dew, 247-252 



Two New Stains for Gonococcus, Schnee 252-253 



EdiToriai,. — Soap for Imbedding, Work of Science-Gossip 253-254 

 Microscopical Apparatus. — Achromatic Condenser, Triple 

 Nosepiece, Compressor, Dissecting. Circuit Stage, Oil Im. 



Condenser, Camera Lucida, Stage Table 254-257 



MiCRoscoPiCAi^ ManipuIvATION. — Cleaning Slides, Decoloriz- 

 ing Algae, Killing Marine Animals, Yellow Fever Germ, 



Staining Capsules of Pneumococcus 257-258 



Necrology. — ^Jabez Hogg , 259 



New Publications. — Baker's Catalogue, Micro-organisms, 



by Whipple. 259-260 



Marine Microscopic Organisms. 



W. H. HARRIS. 

 WITH FRONTISPIECE. 



The organisms referred to are vegetable and are found 

 in fragments of Molluscan shells and ForaminifersB, in 

 calcareous sponge spicules and particles of Polyzoa, in 

 spines of Echinoderms. They are very small, live often 

 at great depths and are studied with difficulty. They be- 

 long to the Thallogens. This subclass has three alliances, 

 Algales, Fangales, Lichenales, and includes asexual or 

 flowerless plants, without proper stems or leaves, mere 

 masses of cells. Reproduction is by disintegration and so- 



