366 FACTORS AFFECTING PHOTOSYNTHESIS 



Seybold, A. ijber die optischer Eigenschaften der Laubbliitter. I, 11. Planta 



i6: 195-226, 479-508. 1932. 

 Seybold, A. tjber die optischer Eigenschaften der Laubbldttcr. IV. Planta 



21 : 251-265. 1933. 

 Shirley, H. L. Light as an ecological factor and its measurement. Bot. Rev. 



1:355-381. 1935- 



Shull, C. A. A spectrophotometric study of reflection of light from leaf sur- 

 faces. Bot. Gaz. 87: 583-607. 1929. 



Smith, E. L. The induction period in photosynthesis. Jour. Gen. Phj'siol. 



21: 151-163. 1937- 



Thomas, IVI. D., and G. R. Hill. The continuous measurement of photosyn- 

 thesis, respiration and transpiration of alfalfa and wheat growing under 

 field conditions. Plant Physiol. 12 : 285-307. 1937. 



Walter, H. Plasmaquellung und Assimilation. Protoplasma 6: 1 13-156. 



^929. 

 Warburg, O. tJber die Geschwindigkeit der photochemischen Kohlensdure- 



zersetzung in lebenden Zellen. Biochem. Zeitschr. lOO: 230-270. 191 9. 



