The Microscope. 221 



Ttus, no matter how many difPerent species of bacteria were 

 growing side by side on the gelatin plate, we can take out under the 

 microscope a little of each by itself and transfer to separate tubes, 

 and thus get what are called " pure cultures " of all the separate 

 species. 



NEWS AND NOTES. 



Professor Mobius, of Kiel, is the new director of the zoologi- 

 cal museum at Berlin. 



Dr. Nathaniel Lieber-Kuhn, son of the discoverer of Lieber- 

 Kiihn's glands, is dead at Marburg, 



A NEW microscopical test for sugar in the tissues described by 

 Molisch, consists in treating the alcoholic specimen with thymol and 

 then an excess of sulphuric acid cone, a beautiful carmine red color 

 resulting. — Pacific Record. 



Mr. S. E. Cassino, Boston, Mass., announces a new edition of 

 the Naturalists' Directory, to appear in January, 1888. All who 

 are interested in any department of natural science should send their 

 names to him for insertion in this work. 



The Swiss Cross continues to grow better with each issue. We 

 congratulate the budding scientists of the land in having so able 

 and instructive an organ. The papers on photography by Mrs. 

 Lam'a M. Marquand are particularly interesting and valuable. 



A. J. Brown declares that the membrane commonly known as 

 "mother of vinegar" is formed by Bacterium xylinum n. sp., and 

 not by B. aceti, to which it has been ascribed. The membrane gives 

 all the reactions of cellulose, which the bacterium forms from the 

 dextrose and other sugars present. — Botanic Gazette. 



Drs. Heitzmann and Bodecker continue their valuable " Contri- 

 butions to the history and development of the teeth," in the Inde- 

 pendent Practitioner. The article for June contains several illus- 

 trations of the histology of the foetal tooth. 



This is what the microscopist says he does when he drinks 

 water from the lea : He gulps down inf usoriae, and quarts of raw 

 bacterife, and hideous rotatorise, and wriggling polygastricse, and 

 slimy diatomacese, and hard-shelled ophryocercinee, and double- 

 barrelled kolpodae, non-loricated ambaedse, and various animalculse, 

 of middle, high, and low degree, for nature just beats all creation, 

 in multiplied adulteration. — Medical Age. 



