17a 



Pub. No. 209, 107 pp., 1915; Spoehr,- Gar. Inst, of 

 Wash., Yearbook 10: 65-66 (1911), 11: 63-65 (1912), 

 12: 82-83 (1913), 14: 64-65 (1915), 15 : 54-55 (1916), 

 Biochem. Zeits. 57 : 95-111 (1913), Bot. Gaz. 59_: 366- 

 386 (1915); Spoehr and Estill,- Car. Inst, of Wash., 

 Yearbook 14: 66 (1915); Long,- Gar. Inst, of Wash., 

 Yearbook, 13: 91-92 (1914), 14: 69-71 (1915), Plant 

 World 18: 261-272 (1915), Bot. Gaz. 59: 491-497 (1915), 

 Physiol. Res._l: 298-315 (1915); Edith B. Skreve,- 

 Plant World 18: 297-343 (1915), Gar. Inst, of Wash,, 

 Yearbook, 15: 64-66 (1916), Physiol. Res. 2 : 73-127 

 (1916). On the production of acids by bacteria and 

 other lower organisms see authors cited on page ^ , 

 note / , page /O , note / and page /$ 

 note , also literature cited by Pfeffer,- Physiology 

 of Plants, vol. 1, pp. 485-489, 52 7-528 (1900), and 

 Marshall,- Microbiology, 2nd ed. pp. (1916). 



