102 



Kansas Academy of Science. 



Experiment No. 2. 



Temperature, 2B C. Time, May 7, 9:00 A. M. 



Light readings: Red, 1.404; blue, 28.63; green, 4.31. 



Leaf No. 1. Leaf No. 2. Leaf No. 3. Leaf No. i. 



Time, 35 minutes 15° drop. 15° drop. 20° drop. 25 twist. 



25 " 14 *' 13' " 15° " 20' " 



Experiment No. 3. 



Temperature, 23° C. Time, May 8, 8:55 A. M. 



Light readings: Red, 5.614; green, 50; blue, 10.93. 



Leaf No. 1. Leaf No. 2. Stem rose. 



Time, 40 minutes 12° 



20 " 5° 



5 " 4° 



5 " 7° 



10 " 9' 



10° 



T 



Stem twist. 



40 

 20 



Experiment No. 4. 



Temperature, 23° C. Time, April 23, 8:35 A. M. 



Light readings: Red, 4.31; green, 65.56; blue, 43.73. 



No. 1. 

 Leaf rnsp.. I 



Time, 20 minutes 7 



20 

 20 

 40 

 5 

 11 

 12 

 13 



Twist of petiole, 40° in 40 minutes, and 50° in 50 minutes. 

 Twist of stem, 8° in 30 minutes, and 9° in 40 minutes. 



Some experiments were made to determine the mutual relation 

 of light and carbon dioxide gas in forming starch. They were as 

 follows : Stomata were found on both sides of the leaf in the ratio 

 of fifteen on upper to twelve on lower, under one-quarter objective 

 and one-inch eyepiece. 



Leaves of a plant which had been covered over night, and from 

 which all the starch had gone, were treated — one with cocoa-butter 

 on the upper side, one with cocoa-butter on the lower side, one with 

 cocoa-butter on both sides. After several hours, the leaves were 

 examined for starch by cross-sectioning the lamina and treating 

 with chloral hydrate iodine and examined under the microscope. 

 The leaf which had cocoa- butter on the under side was found to 

 have starch grains scattered through all the cells. The one treated 

 with cocoa-butter on the upper side had starch scattered pretty 

 well through all the cells, excepting the long palisade cells on the 



