of bars at the temperature of melting ice. 453 
_ Comparisons of 8, and Z, ut the temperature of melting ice—con'd. 
Remarks. 
Date. Time. Bar, Observer. 
F | Ww 
883. 
Feb. 5] 8.18p.u 4, | 29°135} 23°980] B.S. W. 
: 21 1 | 28°406} 24°33 
24 = 780 702 
29 41 | 29°196 va 
34 i 383 268 
at 8, 198} 25'118 
46 : 067 005] R. 8S. W 
50 1 464) 24-280 
57 1 345 21 
.00 1 | 28°802 752 
Feb. 6) 7.23 d 211) 23°866| E.S. W. 
35 1 618 22) 
45 1 | 29°081 656 
52 vy 1 27°966 634 
8.03 1 | 287004 685| R. 8S. W 
! il 1 517 135 
q 18 : 435) 069 
a 21 Pa eee gee 433 
feb. 7 7.46 1 | 28°533} 24-214] B.S. W. 
of 8.03 ty | 29°218]| 23°782 
eS 10 1 | 28°618 29 
a 17 1 | 27994} 646 
: 23 1 | 28°369] 24°019| R. 8. W 
26 1 | 815} 23°516 
35 ‘ 865| 565 
40 , 446] 24-119 
; 43 ‘ 753 425) B.S. W. 
47 1 | 29°404 062 
_ Feb. 8) 9.28 , | 28350} 110) R.S. W. 
; 35 " 727) 23°428 
38 1 764 453 
42 1 260 979 
45 1 388) 247111 
48 i 952) 23°610 
52 1 967 629 
55 : 444) 24-148 
Feb. 9} 5.18 1 438 220| B.S. W. 
23 1 | 29°098| 23-778 
28 " 176 861 
32 1 | 28°626} 24°394 
38 1 Ti 504| R.S. 
40 1. | 29°420 ll 
48 1 454 163 
50 . 730 488 
Feb, 10 11.4la.m.| Z, | 28-330 249 
45 : 631; 284 
50 2 341 016 
55 i 407 308 
12.01 1 372 287 
04 | 498 181 
09 1 796 49. 
14 a 744 639 
19 Zy 410 309] B.S. W. 
21 8: 410 101 
Zine bar mee remained in melting 
ice constantly. 
; oe pried has = aera Se brtiee in 
ast even 
Stel ba was packet | in ice about 
Temperiar of air in comparing- 
44° F,. 
.|Both bars have been unpacked 
and exposed to the air of the 
oe roe during the past 
4 hours. 
‘ Reaversinre of air in comparing- 
44° 
room 4 
ice Pasig Packed in ice about 
Both bars have been out of the ice 
during the past 24 hours 
They were packed in ice about 
‘Temperature of air in comparing- 
room 45° F. 
Both bars have been out of the 
ice since 10.00 P. M. Feb. 8th. 
Both bars were ae n out of the 
ice at 5.55 P. 
At 9.30 Pp. mM. Feb. 9th, the zinc bar was 
placed in its peg taken out —— 
and left ont all night. At arg 
Feb. 10th, a thermometer wh ich bh nad 
Jain alongside the zine bar b Le the 
ge tread —# stag 1 7.30 rk gc zine bar 
n gran nulated 6 and 
bong got the comparin “roo! oom in 
the temperature of the air was 
The, steel bar was packed in ice about 
9.00 A. M. 
