1912] PEIRCE—RESPIRATION 105 
the average of 10 determinations shows that it takes 24.8 calories 
to raise the temperature of flask 14, with thermometer 6 and a 
cotton plug, 1° C. Hence the heat given off by this mouse in 30 
Time | ‘Temperature Time Temperature 
2230 PM ee | 22.6° 2:47.5 P.M 32.0° 
25 2 i ek pes 23.1 ha a Peleg ere eer sneer or. 
Yh, | eter RE ROE i we 24-3 PAG. Be tas a2 4 
7 ob Sel pan re eee ey 24.6 Ce: Beats Ui irene is eA 32.6 
oie merges Ween ne 2505 PUES: [BN pera gate AG eG ag 
SrS0CR i eee 25.4 BORO ae bs 32.9 
AT Cr ee 28.7 WiSOCR oe ee ces 33.1 
2037.5 in yk ca 26.2 DoS einai ao aa. 
BER oe eeu a, 26.4 BEL 8 Oe Loa teins 33.6 
2130.6 ca Le 26.7 7 Bae eee eee 33.9 
230 oo a 27% Meal i i Serio Ph sat 
2530085 ee a 27.5 Se ee ae vie 34.5 
2140 ca ee es 27.9 ZERS esse or, 34.8 
QIAO CR ea eee 28.3 BSR Sr ae ss 35.0 
2248 Gey 28.7 25a 8 ch eee 5.2 
STAR Nee fie 29.0 Ps So RaRe ear er ae eae 
BAe Re ee 20.2 Sings ae ae ear £.5 
20AZ Se 290.4 PE os Gs oes .6 
ae Canaan eee 29.6 PROS cunt ewe 6 7 
254308 oe eas 29.9 = ty fe ara Sb Raita 35.9 
IAA) ee eRe 30.1 BE? Beale cui 36.05 
iy F Sa aee a irae re tage. 30.5 aia ae Sa Marge 36.3 
REAS  Sam gies ot gs 30.7 SIRO Sou Sores 36.1 
RAS <5 63 oo 3t.0 PSO Scere es 36.2 
PAD ess ee 21:2 S250. nee oe 30.4 
PEO SLs wi weve at.5 ROO 6 oven 05 we eo 36.55 
Rays eee 31.7 
minutes amounts to 345.96 calories at least. This takes no account 
- of the amount of heat lost in this time by this set of apparatus, 
being given off to the air; nor does it include any estimate of the 
heat retained by the body of the mouse. The body temperature 
of a mouse I do not know, nor do I know whether the body tem- 
perature rose during the experiment. This amount of heat, there- 
fore, is simply what is absolutely lost to the animal, an amount 
equal to 11.19 calories per minute. The rise in temperature is 
indicated by fig. 6. 
Does the age of the seed affect the heat yield? 
I do not know that any successful attempt has been made to 
answer this question, in spite of the theoretical and practical 
importance which are evident on a moment’s reflection. If the 
