262 
MEASUREMENT OF HIGH TEMPERATURES. 
[BULL 
In Tables 83 and 84 results are given for hydrogen and air, respec 
ively, with an improved form of apparatus. The thermo electric junetioi 
still occupies a position near the center of figure of the helix and pro4 
tected from direct action of the flame by a flat plug or pellicle of asbestusl 
(Fig. 47c); but the terminal tubes of the helix are soldered into th# 
walls of the pneumatic trough, through which they project. In thil 
way a leakage of water is prevented, and the chimney of the burnei 
remains dry and of unifrom temperature. The helix, however, is nakecfl 
here, as in the foregoing experiment. 
Table 83. — Viscosity of hydrogen. 
[Capillary tube No. 10. 
i=33.43 cm . I' + V' 
4.4' 
ij =0.0001416. 6> = 6 11=0.00794"".) 
p 
P 
t" 
To 
9" 
7j" 
F(6") 
1W/B" 
123. 97 
75.66 
95 
51.38 
6 
0. 0001^27 
123. 97 
75.66 
90 
48.73 
6 
1426 
123. 97 
75.66 
90 
48.70 
6 
1427 
123. 97 
123. 98 
75.66 
76.66 
90 
90 
48.80 
48.78 
6 
6 
1424 
1425 
123. 82 
75.66 
90 
48.33 
6 
0. 0001432 
123.83 
75.66 
90 
48.37 
6 
1431 
123. 81 
75.66 
90 
48.42 
6 
1429 
. 123. 83 
75.66 
90 
48.37 
6 
1431 
123. 85 
75.66 
90 
48.39 
6 
1431 
123. 83 
123. 88 
75.66 
75.60 
90 
48.37 
50.64 
6 
482 
1431 
0. 0002813 
440 
1.986 
123. 90 
75.60 
440 
49.83 
490 
2831 
1.999 
123. 92 
75.60 
440 
49.64 
490 
2842 
2.007 
123. 92 
75.60 
440 
49.61 
504 
2867 
2. 021 
123. 92 
75.60 
440 
47.89 
511 
2874 
2.030 
123. 67 
75.62 
630 
50.63 
671 
0. 0003244 
2. 291. 
123. 68 
75.62 
660 
50.96 
695 
3307 
2. 336 
123. 64 
75.62 
660 
50.23 
705 
3320 
2.345 
123. 64 
75.62 
75.62 
680 
50.93 
715 
0. 0003340 
2.359 
123.85 
75.62 
660 
51.75 
688 . 
3295 
2.327 
123. 85 
75.62 
660 
51.55 
691 
3299 
2.330 
123. 85 
75.62 
660 
50.95 
700 
3306 
2. 335 
123. 85 
660 
50.14 
707 
3336 
2.356 
121. 75 
75.72 
1115 
50.82 
985 
0. 0004162 
2.939 
121. 73 
75.72 
1115 
50.77 
985 
4165 
2.941 
124. 64 
76.25 
1080 
50.82 
1010 
0. 0004231 
2.987 
124. 63 
76. 25 
1080 
50.73 
1010 
4237 
2.992 
124. 81 
76. 25 
1080 
51.10 
1007 
4237 
2.992 
124. 83 
76. 25 
1080 
51.19 
1005 
4238 
2.993 
124. 84 
76.25 
1080 
51.21 
1006 
4234 
2.990 
124. 65 
76.32 
1560 
51.24 
1222 
0. 0005254 
3.710 
124. 64 
76.32 
15G0 
51.26 
1227 
5189 
3.6G4 
124. 65 
76.32 
1560 
51. 45 
1224 
5228 
3. 692 
124. 79 
76.32 
1560 
52.23 
1223 
5176 
3. 655 
(916) 
