Tilden: bibliography of American algae. 379 



State at Richmond in Virginia. Mic. Jour, and Struct. Rec. 

 2:353-360. pi. 12. 3842. London.— (Ann. Nat. Hist. 9:66. 

 1842.) 



1051. Rafinesque-Schnialtz, C. S. Prospectus of two in- 

 tended Works on North American Botany. — (Am. Jour. Sci. 

 Arts. 40:221-241. Apl841.) 



A number of new ^jenera, among them, Merasperma, which belongs 

 to the Confervaceae, were to be described. 



1052. . Precis des Decouvertes et Travaux Somio- 



logiques. 1-55. 1814. 



Several new American genera and species of algae described. 



1053. Rafter, G. W. On the Use of the Microscope in 

 Determining the Sanitary Value of Potable Water, with Special 

 Reference to the Study of the Biology of the Water of Hem- 

 lock lake. Proc. Rochester Acad. Sci. Mic. Section. 1886. 

 —(Am. Mo. Mic. Jour. 8:140. J11887.) 



1054. . How to Study the Biology of a Water Supply. 



Proc. Rochester Acad. Sci. Mic. Section. 1887. — (Am. Mo. Mic. 

 Jour. 8:140. J11887.) 



1055. . On the Micro-organisms of Hemlock lake 



Water. Proc. Rochester Acad. Sci. Mic. Section. 1888. — (Am. 

 Mo. Mic. J oar. 9:87-92. My 1888. ) 



1056. . Photomicrographs. — (Am. Mo. Mic. Jour. 9: 



113. Jel888.) 



Specimens of Pleurosigma and Cymbella. 



1057. . The Fresh-water Algae and their Relation to 



the Purity of Public Water Supplies. Trans. Am. Soc. Civ. 

 Eng. 483-557. 9 pi. 1889.— (Eng. and Build. Rec. 20:115, 116. 

 131. 1889. )— (Jour. Roy. Mic. Soc. 1890:489. Agl890.) 



1058. . Deterioration of Water in Reservoirs, its 



Causes and Prevention. 14th Ann. Rep. N. J. St. Bd. Health. 

 111-122. 1890. 



A number of harmful algae are discussed. 



1059. . Biological Examination of Potable Water. 



Proc. Rochester Acad. Sci. 1:34-44. (lOxMr.) 1890.— (Am. 

 Mo. Mic. Jour. 13:55-62. Mrl892.) 



A description of methods and apparatus with reference to microscopi- 

 cal examination. 



1060. . The Microscopical Examination of Potable 



Water. D. Van Nostrand & Co. 1892. New York. 



1061. . Some of the Cii'cumstances affecting the 



Quality of a Water Supply. Proc. Am. W. VV. Ass. 12th Ann. 

 Meeting, held at New York. May 17-20. 1892. 



