Journal of Agricultural Research 
Vol. XXIII, No * 
114 
(6) Grafe, Viktor. 
1914. ERNAHRUNGSPHYSIOLOGISCHES PRAKTIKUM HOHEREN PFLANZEN. X, 494 
p., 186 fig. Berlin. 
(7) Gurjar, A. M. 
1917. THE ADAPTATION OP TRUOG’S METHOD POR THE DETERMINATION OF CAR¬ 
BON dioxide TO plant respiration studies. In Plant World, V. 20, 
no. 9, p. 288-293, i fig. 
(8) Haas, A. R. 
1916. A SIMPLE AND RAPID METHOD OP STUDYING RESPIRATION BY THE 
DETECTION OP EXCEEDINGLY MINUTE QUANTITIES OF CARBON DIOXIDE. 
In Science, n. s. v. 44, no. 1125, p. 105-108. 
(9) Harrington, George T. 
1917. FURTHER STUDIES OP THE GERMINATION OP JOHNSON GRASS SEEDS. 
In Proc. Assoc. Offic. Seed Analysts No. Amer., 1916/17, p. 71-76. 
(10) Harvey, E. Newton. 
1919. THE RELATION BETWEEN THE OXYGEN CONCENTRATION AND RATE OF 
reduction op methylene blue by milk. In Jour. Gen. Physiol., 
v. 1, no. 4, p. 415-419. 
(11) Hempel, Walther. 
1892. methods of gas analysis. Translated from the second German edi¬ 
tion by L. M. Dennis, xv, 384 p., 101 fig. 
(12) Kanitz, Aristides. 
1915. temperatur und lebensvorgange. ix, 175 p., 11 fig. Berlin. 
Bibliographical footnotes. Review by F. E. Denny in Bot. Gaz., v. 
62, no. 2, p. 156-157. 1916. 
(13) Kostytschew, S. 
1908. UBER DIE ANTEILNAHME DER ZYMASE AM ATMUNGSPROZESSE DER 
SAMEnpflanzen. In Biochem. Ztschr., Bd. 15, Heft 2, p. 164-195. 
Bibliographical footnotes. 
(14) Krogh, August. 
1916. THE RESPIRATORY EXCHANGE OP ANIMALS AND MAN. viii, 173 p., 35 
fig. (partly on pi.). London, New York, etc. Bibliography, p. 
151-168. 
(15) Lund, E. J. 
1918. QUANTITATIVE STUDIES ON INTRACELLULAR RESPIRATION. Iv. THE 
RATES OP C 0 2 PRODUCTION BY STARVED AND FED PARAMECIA, AND 
THEIR POSSIBLE RELATION TO THE RATES OP OXIDATION IN THE 
unfertilized and fertilized sea urchins egg. In Amer. Jour. 
Physiol., v. 47, no. 3, p. 318-327. Bibliography, p. 327. 
(16) - 
1919. A SIMPLE METHOD FOR MEASURING CARBON DIOXIDE PRODUCED BY SMALL 
organisms. In Biol. Bui., v. 36, no. 2, p. 105-114, 2 fig. Bibliog¬ 
raphy, p. 113-114. 
(17) OSTERHOUT, W. J. V. 
1918. a method of studying respiration. In Jour. Gen. Physiol., v. 1, 
no. 1, p. 17-22, 1 fig. 
(18) - 
1918. AN INDICATOR METHOD OF MEASURING THE CONSUMPTION OF OXYGEN. 
In Jour. Gen. Physiol., v. 1, no. 2, p. 167-169. 
(19) - 
1918. THE DETERMINATION OP BUFFER EFFECTS IN MEASURING RESPIRATION. 
In Jour. Biol. Chem., v. 35, no. 2, p. 237-240, 1 fig. 
(20) - and Haas, A. R. C. 
1917. AN ADAPTATION OP WINKLER’S METHOD TO BIOLOGICAL WORK. In Jour. 
Biol. Chem., v. 32, no. 2, p. 141-146, 1 fig. 
(21) PettEnkofer, Max. 
1862. UEBER EINEN NEUEN RESPIRATIONS-APPARAT. In Abhandl. Math. Phys. 
Cl. K. Bayer. Akad. Wiss., Bd. 9, Abt. 2 (Denkschr., Bd. 34), p. 
231-276. 
(22) Pfeffer, W. 
1885. tlBER intramolEkulare athmung. In Untersuch. Bot. Inst. Tubingen, 
Bd. 1, Heft, 4, p. 636-685, 1 fig. 
(23) Reiset, j. 
1880. recherches sur la proportion de l’acide carbonique dans l’air. 
Deuxi&me note. In Compt. Rend. Acad. Sci. [Paris], t. 90, no. 20, 
p. 1144-1148, illus. 
