402 ME. W. HOPKIJS'S ON THE CONSTEUCTION OE A NETT CAEOEDIETEE 
V. Same Disc of Chalk. 
Dui’ation of each experiment =500 beats. 
Height of the barometer . =30'22 inches. 
= 'TGT metre. 
Number of 
experiment. 
Temperature of the 
radiating surface. 
Headings of the 
calorimeter. 
Differem-e of the 
readings =E^— E,. 
Temperature | 
of the air. ' 
(1) 
T=213-0 
/Ej = 58-85l 
|R2=61-76/ 
2-91 1 
I 
60 
(2) 
T=212'7 
/Ri = 3844) 
{ R2=6l-36J 
2-92 J 
(3) 
T=213-o 
r Rj = 58*50 1 
tR2=6l-34/ 
2-84^ 
J 
60’5 
(4) 
04 04 
II II 
f Ri = 58-14l 
\ R2=61-22/ 
3-08 
(5) 
T=2l6-2 
rRi = 38-43l 
4R2=61-39| 
2-96 
6l*5 
Hence we have 
(T)=214°-2 (F.), 
(Il)= 59°-94=15°-55(C.)=^, 
(T)-(E) = 154°26 = 85°-7 (C.)=^. 
Also, taking the mean value of the “ Differences,” 
K2-E,=2-94. 
VI. Same Disc of Chalk. 
Duration of each experiment . =400 beats, 
tieight of the barometer . . =30-22 inches. 
= -767 metre. 
Number of 
Temperature of the 
Heading of the 
Difference of tlie 
Temiierature j 
experiment. 
radiating siu-faee. 
calorimeter. 
rea dings = Ej — K J . 
of tJie air. i 
(D 
T=29^5 
/ Ri = 58-41 \ 
4 R9=62‘68 J 
4-27 I 
j 
1 
60*5 ; 
(2) 
T=290*0 
rRi=58-19\ 
\ R2=^ 62-25 J 
4-06 J 
! 
(3) 
T= 289-5 
/Ri = 58-2n 
tR2= 62-25/ 
4-04 
60-5 ; 
' 
(4) 
T=288-5 
/R, =58-301 
\R„= 62-28/ 
3-98 T 
: 
V 
61-5 
(5) 
T=289'0 
/Rj = 58-53l 
4R2=62-60/ 
4-07 J 
1 
