476 IOWA ACADEMY OF SCIENCE Vol. XXV, 1918 



135. Weichardt and Wolf, Chem. Zentralhalle, 1916, II, p. 



204; through C. A., 11, p. 3,355, 1917. 



136. Weseiiberg, Hyg. Rundschau, 25, No. 8, p. 273, 1915. 



137. Wliittaker, Am. J. Publ. Health, 4, p 688, Aug., 1914. 



138. Woodhead, Lancet, 187, p. 736, Sept. 19, 1914. 

 K. Miscellaneous. 



139. Anon., Canadian Engr., 30, p.' 189, 1916. 



140. Anon., Eng. News-Record, 79, p. 271, 1917. 



141. Anon., J. Am. Med. Assn., 66 p. 130, Jan. 8, 1916. 



142. Anon., J. Am. Med. Assn., 67, p. 890, Sept. 16, 1916. 



143. Anon., Municipal Eng., 58, p. 155, Aug. 31, 1916. 



144. Colin, Comptes rendus Acad. Sci., 161, p. 652, 1915. 



145. Kraiise and Barbara, Wiener med. Woch., 38, No. 30, p. 



810, 1915. 



146. Levy, Miinchener med. Woch., 62, No. 42, p. 1,424, Oct. 



19, 1915. 



147. Parkes and Rideal, Transactions of the Epidemiological 



Society, London, Volume 20. 



148. Strell, Miinchener med. Wochenschrift, 62, No. 34, p. 



1,158, Aug. 24, 1915. 

 148. Weichardt and Wolff, Mediz. Klinik, Jan. 23, 1916, 

 through N. Y. Med. Journal, March 25, 1916. 



Laboratories of the State Board of Health, 

 The State University. 



