1890.] MICROSCOPICAL JOURNAL. 217 



NOTES. 



The American Drawing Ink. — This ink, first introduced in 1880, 

 under the name of the " American Drawing Ink," or the " American 

 India Ink," has now gone into general use, and is recognized as 

 the leading drawing ink in the United States, having extensively dis- 

 placed the original stick ink, and superseded all the crude liquid inks pre- 

 viously attempted. It is not a solid ink ground up, but a new native ink, 

 made fluid from the outset ; and it will never become gelatinous, thick, 

 or offensive, or deposit carbon, like all so-called " Liquid Inks " with 

 which draughtsmen have been heretofore afflicted. It thus fills a long- 

 felt Avant. This ink is put up in a special bottle, with a quill for filling 

 the pen and an improved stopper, and is thus ready for instant use. 



There are two kinds of black ink, viz : General drav^nng ink (red 

 label) , which is best for tints and washes, for tracings, for Patent Office 

 and photo drawings, and all fine-line work. 2d. Waterproof drawing 

 ink (white label), which is insoluble when dry, and is best for work- 

 ing drawings w^hich have to stand handling, moisture or color washes. 



The blue, scarlet, and green drawing inks sell for 25 cents per bot- 

 tle, the carmine for 35 cents. There is no better ink for making draw- 

 ings of microscopic objects. They may be obtained from Geo. S. 

 Woolman, New S'ork. 



Dead Uroglena volvox. — During the season T889 the cities of 

 Middletown and Meriden, Conn., had their reservoir water rendered 

 almost unusable by the development in it of a very strong fish-like 

 odor. An examination show^ed that this was due to the presence of an 

 abundance of Uroglena volvox^ Ehr. While alive, the organism pro- 

 duced no effect upon the taste or odor of the water ; but, in passing 

 through the mains, became entirely decomposed with immediately dele- 

 terious results. — S. W. Willisto7t^ in The Microscope^ March, 1890. 



The Youth's Companion for September 11, 1890, has a bright 

 paper on The Microscope at the Pond-Side, by Stephen Helm. Mi- 

 crasterias dentic7ilata^ Closteriuni lunula^ Volvox globator^ Cyclops 

 quadricornis^ Daph^iia piilex^ Vorticella nebulifera^ and Conochilus 

 volvox are described and figured. It is far better to interest the youth 

 in the beginnings of scientific knowledge than to fill their heads with 

 useless or silly stories as was once the practice. 



MICROSCOPICAL SOCIETIES. 



San Francisco, Cal. — W. E. Loy, Sec'y. 



Ju7ie 25, z8go. — In the absence of the President and Vice-President, 

 J. G. Clark was called to the chair. The Corresponding Secretary 

 reported the receipt of papers from Carl H. Eigenmann, Ph. D., " On 

 the Egg Membranes and Micropyle of some Osseous Fishes," " On 

 the Genus Clevelandia," and " Embryology," " Memoirs of the Na- 

 tional Academy of Science," vol. iv, part 2 ; " Annual Report of the 



