1914] GATES—XEROPHILY 467 
TABLE II 
Under room conditions (temp. 18-24° C.; rel. hum. 27-45 per cent) 
Solution at warmer | Solution at colder 
temperature (20°) temperature (0°) 
hr. cm./hr. 
preset. eo (Cha maedaphne association)... 3.1 (29) 25443) 
Chamaedaphne (Carex association). ............ 3.2 (13) 3.1 (12) 
Chamaedaphne ys arix iain AOD eee 3-5 (14) 4-3 (12) 
Acer rubirara. 05004 0.8 ( 3) 0.6 ( 4) 
Sutras salicifilia (22 45 ea 2.1 ( 2) 13 (-2) 
Betula pumila: oo .5 6s ee ces 2.4 ( 3) 2.0 ( 3) 
Lavix larkcie. saves ee 3.0 (17) 2.7 (19) 
Under conditions found over steam radiator 
Solution at warmer —— at colder 
temperature (40°) mperature (0°) 
Chamaedaphne calyculata................ or 3.0( 9) 2.8 ( 9) 
Larix laricins.. 654 he SEL. ie eee 
Experiments that td h rate of conduction less than 1 cm./hr. Conduction 
tinued to take pl ft e solution was frozen. 
Relationship between rates of conduction and transpiration in evergreen 
ertcads 
Tables III and IV summarize the experimental results. 
TABLE III 
EXPERIMENTS OF APRIL 4-6, 1912 
Rate of conduction in centimeters per hour 
Chamaedaphne Andromeda Vaccinium 
calyculata glaucophylla macrocarpon 
April 4... nosis sas peanuts 5-90 (7) SANZ) a a 
Apts 4:66 (G) 1s oe 8.3 (12) 
April 6) So ee 11.1 (12) 16.3 (11) 
biog i Vases Wee ven eee 5:34: 8.43 42.11 
RAO. isos 1.00 1.58 2.29 
Rate of transpiration in grams per hour per 100 sq. cm. of leaf surface 
Chamaedaphne Andromeda Vaccinium 
calyculata glaucophylla macrocarpon 
Apel 4.06 ee ©.140 (2) 0.230 (2) 
Ap «cs 9408 (2) ob eee 0.301 (2) 
April 6. sissies ae a 0.290 (2) 0.527 (2) 
Averate. i iisi i ee 0.121 ©. 260 0.414 
Ratio: ov ca 1.00 2.15 3.42 
