1909.] Vegetable Assimilation and Bespiration. 



7 



Table III. — Cherry Laurel : area by disc method. 

 Assimilation experhneiit ; August 29, 1907. Leaves detached, in glass case 

 supplied with large excess of CO2. Five hours of bright sunshine. 

 A, fully insolated ; B, shaded by double thickness of wet cotton cloth. 



Numbers are grammes, and refer to the particular number of discs of leaf 



lamina. 



Leaf. 



No. of 



discs. 



D17 

 weight. 



Gkiin of 



dry 

 weight. 



CO, 

 found 

 on com- 

 bustion. 



Gain of 

 CO2. 



Starch 

 corre- 

 sponding 

 to gain 

 of CO-j. 



Ash 

 found 

 on com- 

 bustion. 



Gain of 

 ash. 



- 



Calculated 

 gain of 



dry 

 weight. 



A 2 



14 



{a) 



0 -1245 

 0 -1316 



0 -0071 



0 -2192 

 0 -2362 



0 -0170 



0 -0104 



0 -0085 

 0 -0073 



-0 -0012 



0 0092 



3 



15 



(«) 

 (*) 



0-1097 

 0 -1119 



0 0022 



0 -1919 

 0 -2000 



0 -0081 



0-0049 



0 -0062 

 0 -0055 



-0-0007 



0 0043 



4 



15 



(a) 

 (*) 



0 -1064 

 0 -1162 



0 0098 



0 -1861 

 0 -2035 



0 -0174 



0 -0107 



0 -0066 

 0 -0068 



-t- 0-0002 



0 0109 



B 2 



15 



(«) 

 (*) 



0 1314 

 0 -1286 



-0 -0028 



0 -2346 

 0 -2246 



-0 -0100 



0 -0061 



0-0067 

 0 -0068 



■t- 0-0001 



-0-0060 



3 



12 



(a) 

 (*) 



0 -0861 

 0 -0925 



0 0064 



0 -1520 

 0 -1655 



0 -0135 



0 -0083 



0 -0052 

 0-0050 



-0-0002 



0 0081 



4 



15 



(a) 

 (*) 



0 -1267 

 0-1318 



0 -0051 



0 -2227 

 0 -2304 



0 -0077 



0 -0047 



0 -0068 

 0-0075 



■1-0 -0007 



0 0054 



Analyses with Lead Chromate (to drive oft' CO2 from ash). 



Table IV. — Cherry Laurel : area by disc method. 

 Assimilation experiment; August 16, 1907. Leaves detached, in glass case 

 supplied with large excess of CO2. Time of exposure 11 a.m. to 6 P.M., 

 7 hours. Occasional sunny intervals, temperature in case varying from 

 18° to 27° C. according to illumination. 



Numbers are grammes, and refer to the given number of discs. 



Leaf. 



Number of 

 discs. 



Dry weight. 



Gain of 

 dry weight. 



CO., 

 found on 

 combustion. 



Gain of 

 CO.. 



Starch 

 corresponding 

 to gain of CO2. 



12 



12 

 10 

 9 

 10 



(a) 



0 



•1070 



(*) 



0 



-1177 



(a) 



0 



■0931 



(*) 



0 



•1042 



(a) 



0 



•0805 





0 



-0950 





0 



•0731 



(*) 



0 



•0784 



(a) 



0 



■0866 





0 



•0941 



0 0107 

 0 0111 

 0 0145 

 0 0053 

 0 0075 



0 



1970 



0 



2126 



0 



•1682 



0 



•1828 



0 



•1465 



0 



•1701 



0 



•1302 



0 



•1392 



0 



•2689 



0 



•1717 



0 ^0156 



0 ^0146 



0 ^0236 



0 •oogo 



0 0096 



0 -0090 



O 0145 



0 0055 



0 0156 0 0096 



