I00 BOTANICAL GAZETTE [FEBRUARY 
March 26, 11:30 A.M.; room temperature 16.4° C. Five lots, 
75 gr. each, of air-dry peas were kept in constant temperature 
room A for a week, in five Dewar flasks. Thermometers, bottles 
of boiled distilled water, and of saturated aqueous solutions of 
mercuric bichloride, had been placed in room A at the same time, 
and were therefore of like temperature. Each lot of peas was then 
thoroughly washed in the bichloride solution, rinsed twice with 
boiled distilled water, and covered with 100 cc. of boiled distilled 
water in each flask. (The rinsing water came from the laboratory 
and had a temperature 2° C. higher than that put in the flasks to 
start germination. 
The temperatures were: 
goog ti “cages risa 
2, 17.3 
ce 4 “ce <, 16.9 
6c 4 “ ‘ 18.4 
ith “ 6, 17.5 
MARCH 27, 10 A.M.; ROOM 16.25° 
hg se Riles SOG os 9° — 37.0 CC Absorbed 63.0 cc. aq 
Bee a sten eres ey, 44. “i ; 
fs hase Gps oe 55 —40.5 2 50.5 
Ries acs eae 18.3 45.4 = 54.6 
eee: Geka nee *. | —45.5 we 
I poured off the unabsorbed water in each flask as indicated 
above, showing that each lot of 75 gr. of air-dry peas had absorbed 
the number of cc. of water above stated. The rise in temperature 
in each flask showed the liberation of heat. Reckoning the heat 
equivalents already found of the pieces of apparatus, the peas, and 
the water, we find that there were liberated in each flask the fol- 
lowing quantities of heat, plus whatever had been lost by radiation 
through the flasks, by leakage through the cotton plugs, etc., in the 
first 22.5 hours of the experiment, namely: 
PN sees t.§ 218.55 calories 
gee payee 1.4 96.00 
Bea ie 0.00 0.00 
Orel ss 0.9 129.75 
Averabe Ohio. 6 5 SS 130.68 calories 
