790 



BIOLOGICAL EFFECTS OF RADIATION 



53. Waldram, J. M. The precise measurement of optical transmission, reflection, 

 and absorption factors. Report Int. Ilium. Congress, Saranac Inn, N. Y. 1928. 



54. WiESNER, J. Untersuchungen liber den Einfluss des Lichtes und der strahlenden 

 Warme auf die Transpiration der Pflanze. Sitzber. K. Akad. Wiss., Wien, 74: 

 55 pages, 1876. 



55. Zacharewicz, E. (A comparative study of different colored glass for green- 

 houses.) Jour. Soc. Nat. Hort. France. 4 ser., 3: 265-268. 1902 {Ahs. in Exp. 

 Sta. Rec. 14 : 354. 1902.) 



Manuscript received by the editor AiigtLst, 1934. 



