452 Experiments to determine variations in length 
Comparisons of 8, and Z, at the temperature of melting ice—con'd. 
E.S. W. Both bars have remained in ice 
all night. 
~ 
w 
Zinc bar has remained in melting: 
28°532| 24-460 ice constantly. 
0) 
i) 
ee 
: 
AS TTP A » 
Micro-readings. | 
Date. Time. Bar. Observer. Remarks. 
F Ww 
1883 
Jan.31| 7.57P.M,| § 1 | 27°926) 23-830} EH. S. W. |Steel meter was fully packed in 
8.05 By 915 700 ice at 6.55 P. M., and zine meter 
14 8, 749 695 at 
17 Zi 556) 411 The temperature of the ice (gren- 
22 8: 716} 660 ulated snow brought in 
26 1 5 out doors at 6.55 M.) Ww: 
30 1 | 28°272| 24-217; R.S.W.| found to be below the melti 
35 1 point. Hence both boxes were 
40 1 361] 324 placed near a furnace fire until 
50 Ly 321 177 the snow woul adher 
55 1 064) 064 the bars. Temperature of com- 
59 1 OTT) 23°956 paring-room 50° F, 
9.02 1 | 27997} 994 ~ a P.M. Z, was put inside and raised 
Feb. 2} 8.55 1 | 28°800) 24-223) EK. S. W. t 84 inch from bottom of tin be 
9.02 | Z, |29-486| 23-310 ce ier tnnies wan rconaaiat 
09 1 | 27°94 H 4 F. ater w o 1 test ee pose 
1S 1 | 28°661} 22°54) FO WAS 8ta: 3 n 
24 1 |. 208] 23-680] B.S, W.| semeteed'et cor tomperatare, soul 
27 1 | 29-069} 22-95¢ 2. Wie taken out of water wt Clee 
30 1 | 27-909) 23-395 packed in ice at 8.45. 
36 1 | 28°475) 22-406 S$, was packed in ice at 8.30. 
Feb. 3 1A a, as 23 1 2 Both bars remained packed in i 
92 : 41¢ 508 ane wen of gorge 
- Se si om Kee oukel ae additional ice a 
36 : 29-068 197 remained so until readings 9& 
40 , {28918} 05s — 
45 1 16 496 
49 1 | 27°850 252 
55 1 | 28°463} 22°619 
Feb. 3| 7.29p.m.| S, | 28°361/ 23-979| E. S. W. |Both ba bars have been kept packed 
38 1 858 300 in ice since 1] 
44 1 peoies 552 
49 1 8°502| 24°145 
58 a 837 R. 8. W 
8.03 1 | 29°474] 23-910 
10 : 6 176 
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