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810. Lauzi, M. Le Thalle des Diatomees. Ann. Soc. Belg. 

 Mic. 4: 1878.— (Jour. Roy. Mic. Soc. 2:38. 1879.)— (Am. Jour. 

 Mic. 4:134-136. Jel879.) 



811. Lattimore, S. A. Report on the Recent Peculiar Con- 

 dition of the Hemlock Lake Water Supply. Ann. Rep. Exec. 

 Bd. City Rochester for 1876. Continued in Ann. Rep. 1877. 



812. Lawsoii, G. Botanical Society of Canada. Abstract 

 of Recent Discoveries in Botany and the Chemistry of Plants. 

 Seaweed as a Manure. Can. Nat. Geol. 6: 70-73. F1861. 



813. . Gulf-weed at Cape Sable. Can. Nat. Geol. II. 



1 : 3. F1864. 



814. . Diatoms of the South Pacific. Can. Nat. Geol. 



II. 1:14. P1864. 



815. . On the Laminariaceae of the Dominion of 



Canada and adjacent Parts of British America. Trans. Nova 

 Scotianlnst. Nat. Sci. 2^:109-111. (lOJa.) 1870. 



Notes on 14 species. 



816. . North American Laminariaceae. — (Can. Nat. 



Quart. Jour. Sci. N. S. 5:99-101. Mrl870.) 



Read at meeting of Nova Scotian Institute. 



817. Le Coiite, L. J. Liquid from the Fountain of Blood, 

 near Virtud, Honduras. Proc. Phil. Acad. Donations to Mu 

 seum. 1858: ii. (20Apl858.) 1859. 



A vial of the liquid is donated to the Museum. 



818. . Contamination of Water in Certain Storage 



Reservoirs on the Pacific Coast, and the Palliations resorted 

 to. Proc. Am. W. W. Ass. 10th Ann. Meeting. Chicago, 111. 

 May 20-22. 1890. 



819. . Some Facts and Conclusions Bearing upon the 



Relations existing between Vegetable and Animal growths and 

 Offensive Tastes and Odors in Certain Water Supplies. Proc. 

 Am. W. W. Ass. 11th Ann. Meeting. Philadelphia, Penn, Apr. 

 14-16. 1891. 



820. Leeds, A. Reports on Water Supply of Philadelphia. 

 Rep. Water Supt. 1883-1885. 



821. . The American System of Purification of the 



Water Supplies of Cities. Trans. N. Y. Acad. Sci. 6:42-56 

 1886-1887. 



Describes condition of water supply of Hobolcen in 1884. Oscillaria- 

 toriae covered surface in the reservoir. 



822. . Report of the Committee on Animal and 



Vegetable Growths affecting Water Supplies. Proc. Am. W. 

 W, Ass. 11th Ann. Meeting. Philadelphia, Penn.' April 14-16. 



