TRANSACTIONS OF THE SECTIONS. 193 
Temp. of water Temp. 
in box. of air. 
108 © ¢ Stopped 15 minutes to tighten first-mo- 
Wha. ies tion driving belt. 
oe ie ted, aS 
Sees eres, LTS 
een ee DD) Kae 78 
Seo eis 126 
we +s +s: 130 .. Thermometer indicates no higher. 
Stopped 30 minutes to cut larger hole 
Ce ae ete aie for new thermometer. 
Seat se, oe 
© «e+e (134 
agreehs, o1S6 
: pes ay 
_ Temp. of water in box increased from 102° to 140°. Increase in 13 hours 38° 
_ Loss by radiation in 11} hrs. 18°, or 1°56 per hour. 13 hrs. at 1°56 per hour 20°28 
58°28 
Average number of revolutions per minute 88°64. 
: 
ae 
| Total increase of temperature in 13 hours 58°28, or 4°°483 per hour. 
50 gallons of water. 
First Series oF EXPERIMENTS.—June 26, 1857. 
Result of sixth day (13 hours), heating water by churning. 
7 Oa. . . . 122 . . 62 7.45 a.m. second- motion belt broke: 
80 ,, : 1 124 started again 8 A.M. 
BOLO. 4; ‘ . 128 é 9 5.a.m. Glass tube in which thermo- 
100 ,, Chaticts ae meter was placed broke, carrying 
TO! -;, es ; thermometer into box; defect made 
120PmM. . - . 124 good; started again 10 15 a.m. | 
O55 ee OS trys 7/15 , 
20 55 ete ke le OO 
BOs 55 pac 132 
55 See UA S6, Hine fs) 
EO 55 5 idle aks einem os 
60 ,, - « - 140 
nO. ,, tunis fete: hae 
8 0 on Ana 144 sens AO 
“Temp. of water in box increased from 122° to 144°. Increase in13 hours . 22° 
oss by radiation in 11 hrs. 18°, or 1°63 perhour. 13 hrs. at 1°63 per hour. 20°19 
42°19 
Total increase of temperature in 13 hours 42°19, or 32°45 per hour. 
Average number of revolutions per minute 88°64. 
50 gallons of water. 
a 
= Srconp Srries or EXPERIMENTS.—July 14, 1857. 
Result of seventh day’ s trial.— Apparatus for heating water in small box. 
5 Soa of water in box increased from 68° to 118°, or 50° in 5 hours. 
_ Loss from radiation in 13 hours 22°, or 1°69 per hour, 8°45 in 5 hours. 
Total increase of temperature of water in box 58°45. 
Total increase of temperature of water in 5 hours 58°45, or 11°69 per hour. 
_ Five gallons of water in box. 
36:04 revolutions per minute. 
he churning--box on this trial was entirely covered with hair-felt, and stood upon 
r glass pillars 2 inches high. This was placed in an outer box; the inner or 
ing-box being stayed with glass props to prevent radiation by coming in contact 
ee outer box, or from moisture which might accumulate in bottom of same. 
iN re 1 3 
