DETERMINATION OF THE SPECIFIC HEAT OF WATER. 463 
APPENDIX, 
We give the observations and the calculation of the result of the experiment on 
20th May, which is typical of the other experiments. The symbols used are the same 
as those on pp. 421 and 422. 
(1.) Lhe Electromotive Force.—Comparison of the Clark cells. 




Before the experiment After the experiment 
Time: 11 43m Time: 12) 16™ 
Go ie 0G ts = 177-23 
| I—Standard = —3:2 (a) I.—Standard = — 40 (ag) 
Wen hc aa 46 Nene eee ees 
| Te ee Se Ube 6 eee este OS 
Ve a ee i= » = - O8 
Vvi— (zc) V— 5 = = Id) 
Vii ee aes S07 Wie 5 SS Te 
VII— — sg = SO: Vi— = 3 -= e708 
VIll.— 55 = —01 VIIl.-— . ed: 
Ix.— eS ee oe Ix.— pS oe 
x.— eo) x.— » = + Ie 
5 = —09 s& = —101 
I.—Standard = — 4:0 (4,) I.—Standard = — 4:0 (a;) 
po = UPA (2 
[Ser tea (ies Were eX i= 14-0) etl == (Ie Mee Xe = 15-0 
| Set 2.—(. +I. +...4K)= +20] Set2.—(.—I.+...4+K)= +132 
I.—Standard= — 3:2 (a) I.—Standard = — 4:1 (a) 
te = 172-12 | tg = 17°17 
Time: 11! 53" | Time: 11 06™ 




The observations in the column headed “ After the experiment” were made from- 
below upwards, the interval between 11" 53™ and 12" 06™ being taken up by the 
experiment on the equivalent. The correction due to temperature change here is 
5 X (a3 — a, + a, — a.) = 05. 
Hence 
Set (1) + Set (2) = 20 standards + 6°6 (see p. 422). 
As the total resistance of the circuit differed very little from 10,000 ohms, and the 
electromotive force of the LecLANCHE used was 1°45 volts, the correction to the 
battery of Clark’s becomes 6°6 X 1:45 X 107-* = 0:0010 volt. 
