106 Dr. H. T. Brown and Mr. F. Escombe. [Jan. 9, 
Table X.—Second Series of Experiments on the Thermal Interchanges between 
by Revolving Sectors Arranged to Cut Off a 
















S 
| Meteorological data. S 
| o 
mre , 2 - 2 
S Aor | oy . © 
No. of é 3 & 2 AS S | é 
. Species of plant and general h 3 2 jes | bse | ae a 
experiment diti ¢ See | q OTS | et cee =. 
eda: conditions of experiment. 5 5 oH 2 | si 22) 85 
| B | Besa 6S | ee 
| : a = Z Sou, | Go | wu 8 o's 
os ~~ Pa ° ® of | es 
a0 © 2 ore GR | og 
$e | 48 ‘4 |_38| 24) Be leas 
5 S 5 oes acy S.8 3 fe) OS) £ yw 
oo »~ > 8 tos] fo) os 
| aH p> 0 |REA| So | aa | ee 
| eu A | & ia GB |e te 
(1) | (2) (3) @ | ©) | © | Oe a ae 
XIV. Helianthus annuus— | 2 2 hese 
July 8, Leaf A received full insola-| (A) 90, 21°2 | 15°4 | 9°81) 52 | 14°4 |—0°17 
1901 tion, whilst B received (B) 90| 21:2/15°4 | 9°81) 52 | 14-4 |—0O-91 
exactly one-half of that. | 
| incident on A | | 
XV. | Helianthus annuus— | | | 
July 9, | Leaf A in full sunlight ......... | (A) 100) 22°2 | 15:1 | 9:13) 46 8:0 —1°15 | 
1901 Leaf B behind radial sectors) (B) 100} 22°2 | 15'1 , 9:13 | 46 8:0 —1°46 
arranged to cut off one-half | 
of full radiation | | 
XVI. Helianthus annuus— | | 
July 11, Leaf A in full sunlight .......... (A) 100} 27°2 | 19°0 / 11°56 | 48 | 12:0 —0-40 
1901 Leaf B received one-half of (B) 100} 27°2 | 19-0 | 11°5 43 | 12-0 |—1°84 
| solar radiation falling on A 
XV LT. | Helianthus annuus— | | | 
July 15, | Leaf A received full insola- (A) 70) 22:2 | 15°6 | 9°60) 48 | 17:1 —0-74 
1901 tion | '(B) 70 22:2/15°6 | 9-60] 48 | 17-1 |—-0-97 
Leaf B received three-fourths | | | 
| of full insolation | | 
| 
XVIII. | Helianthus annuus— | | 
July 17, Leaf A received full sunshine... (A) 76/ 25°4 | 19°0 | 12°28) 51 | 11°2 |—0°82 
1901 | Leaf B received three-fourths (B) 76) 25°4 | 19°0 | 12°28 | 51 | 11°2 |—1°53 
full sunshine | 
XOEX: Helianthus annuus— | | 
July 18, | Leaf A received full sunshine.... (A) 100; 27°5 | 19-7 | 12:26 | 45 | 18°2 |—1-45 
1901 Leaf B received seven-eighths (B)100| 27°5 | 19°7 12°26 | 45 | 18°2 |—1°55 
full sunshine | | 
XX. Helianthus annuus— | | 
July 19, | Leaf A received full sunshine...| (A) 75 | 27°6 | 19°6 | 12°03 | 438 | 11°7 |—-0°61 
1901 Leaf B received seven-eighths| (B) 75 | 27°6 | 19°6 | 12°03 | 48 | 11°7 —0°84 
| full sunshine | | | | | | 



