6 Mr. D. Thoday. Experimental Researches on [June 11, 



Table I. — Hcliantlms tubcrosus : area of entire half-leaves by planimeter 



method. 



Assimilation experiment; August 23, 1906. Leaves attached to plant; darkened 

 previous evening. Intermittent sun. Time, 7| hours : 10 a.m. to 5.30 p.m. 

 a = control half-leaf ; h = experimental half-leaf. 



Numbers are grammes per square decimetre. 



Leaf. 



Area in 

 sq. cm. 



Dry 

 weight. 



Gain of 



dry 

 weight. 



CO. 

 found 

 on com- 

 bustion. 



Gain of 

 CO.. 



Starch 

 corre- 

 sponding 

 to gain 

 of CDs. 



Ash 

 found 

 on com- 

 bustion. 



Gain of 

 ash. 



Calculated 

 gain of 



dry 

 weight. 



1 



(a) 26-9 



(b) 26-8 



0-378 

 0-417 



0 -039 



0-633 

 0-694 



0 -061 



0-037 



0-049 

 0 -053 



0-004 



0-041 



2 



(a) 60-2 

 {b) 58-5 



0-342 

 0-365 



0 -023 



0-556 

 0-603 



0-047 



0-029 



0-040 

 0-043 



0-003 



0 -032 



3 



(a) 77-5 

 (6) 85-5 



0-399 

 0 -393 



-0 006 



0-618 

 0-611 



-0-007 



-0-005 



0 -064 

 0-063 



-0-001 



-0 006 



4 



(a) 80-2 



(b) 77 -8 



0-446 

 0-470 



0-024 



0-671 

 0-704 



0-033 



0-019 



0-084 

 0-086 



0-002 



0 021 



Table II. — IMianihus tnhcrosns: area by templet method. 



Assimilation exporiment; August 28, 1907. Leaves detached, in greenhouse; 

 temperature 25° — 27° C. Sun, under canvas. Time 8.30 a.m. to 3.30 p.m. : 

 7 hours. 



Nunil)ers are grammes, and refer to the given areas. 



Loaf. 



Area in 

 sq. cm. 



Dry 

 weiglit. 



Gain of 



dry 

 woiglit. 



CO2 

 found 

 on com- 

 bustion. 



Gain of 

 CO..,. 



Starch 

 corre- 

 sponding 

 to gain 

 of COj. 



Ash 

 found 

 on com- 

 bustion. 



Gain of 

 nsli. 



Calculated 

 gain of 



dry 

 weight. 



1 



50 



(a) 0-1405 

 (6) 0-1068 



0 0203 



0 -2324 

 0 -2005 



0 -0361 



0 -0209 







0 -0236 

 0 -0267 



0 -0031 



0 0240 



2 



50 



{a) 0-1513 

 (i) 0-J022 



0 0109 



0 -2518 

 0-2651 



0-01.33 



0 -0082 



0 -0195 

 0 -0219 



0 -0024 



0 0106 



3 



50 



{a) 0-1449 

 (h) 0-1597 



0 -0148 



0 -2333 

 0 -2550 



0 -0223 



0 -0137 



0 -02.36 

 0 -0267 



0-0031 



0 0168 



4 



40 



i'l) 0-1223 

 (h) 0-1297 



0 0074 



0 19.>2 

 0 -2080 



0 -0128 



0 -0088 



0 -0222 

 0 -0223 



0 -0001 



0 0089 



0 



40 



(i) 0-1284 

 (b) 0-1340 



0 0062 



0 -20t(; 

 0 -2150 



0 -0104 



0 -0004 



0 -0209 

 0 -0232 



0 0023 



0 0087 



