424 
PROF. LOUIS VESSOT KING ON THE CONVECTION OF 
Table VII. 
Wire No. 1. Diameter, O'0153 cm. Inclined at angle f with the vertical: direction of stream horizontal. 
0-017 
210° 
409° 
610° 
800° 
987° 
</> = 0° c = 
•089 
•241 
•388 
•602 
•884 
b = 1 • 5 x 1 O' 5 
B = 
•0264 
0508 
•0772 
1012 
1272 
B/(0-0ir) 
1-255 
1-241 
1-265 
1-265 
1 - 290 x 10"" 4 
Po = 1-26 x 10- 4 
-s- 
II 
03 
t— * 
o 
O 
II 
•109 
•259 
•362 
•520 
•860 
b = 8-0 x 10“ 5 
B = 
0227 
•0460 
0725 
•0985 
1213 
B/(0-0 17 ) 
1-081 
1-122 
1-188 
1-231 
1-230 x10- 4 
po = 1-15 x10“ 4 
</> = 45° C = 
•084 
■206 
■413 
•639 
1-000 
b = 5-Ox 10" 5 
B = 
0216 
•0452 
•0644 
•0843 
1034 
B/(0-0 17 ) 
1-030 
1-103 
1 - 056 
1-054 
1-049 x10- 4 
Po = l'02x 10- 4 
-e- 
II 
03 
o 
O 
II 
•090 
•224 
•396 
•562 
•846 
ft = 9'0x 10~ 5 
B = 
0172 
•0346 
0522 
0704 
0885 
B/(0-0ir) 
■818 
■845 
-856 
■880 
■897 x 10- 4 
po = ' 81 x 10 -4 
f = 90° C = 
■077 
•177 
•318 
•551 
•823 
b = 4-Ox 10“ 5 
B = 
0138 
0285 
■0430 
•0549 
•0694 
1 - 
1 
pq ' 
■658 
• 696 
■704 
-687 
■703x 10" 4 
p 0 = ■ 67 x 10 -4 
Effect of Inclination on the Convection Constants B and C. 
Table VIII. 
0-0 0 
200° 
400° 
600° 
800° 
1000° 
1200° 
1400° 
1600° 
c = -00114. 
M 
246 
582 
1000 
1530 
2140 
2840 
3640 
4,520 
6 = -000080. 
N 
1-46 
1-98 
2-56 
3-23 
3-93 
4-67 
5-43 
6-30 
k 0 = 2 • 37 x 10~ 4 watts. 
Wire No. I. 
•11 
•24 
•40 
•60 
■81 
109 
1-44 
1-96 
d = '00404 cm. 
log b/a 
3-33 
3-60 
3-73 
3-80 
3-93 
3-88 
3.77 
3-43 
V 0 
6-9 
5-3 
4-6 
4-3 
3-8 
4-0 
4-5 
6-2 
log 6/a = 3 • 68 
V cm./sec. 
1O-0 
10-5 
11-8 
13-9 
15-0 
18-7 
24-4 
39-0 
Wire No. II. 
•12 
•29 
•47 
•70 
•95 
1-24 
1-62 
2 19 
= -00691 cm. 
log b/a 
3-05 
3-17 
3-26 
3-35 
3-41 
3-35 
3-07 
Vo 
5-3 
5-7 
4-7 
4-3 
3-9 
3-7 
4-0 
5-2 
if earn log b/a = 3 • 20. 
V cm./sec. 
7* 7 
11-3 
12-0 
13-9 
15-3 
17-2 
21-7 
32-8 
Wire No. III. 
13 
•31 
•52 
•75 
103 
1-29 
1-64 
2-18 
d = -01262 cm. 
log 6/a 
2-81 
2-79 
2-87 
3-04 
3-09 
3-28 
3-31 
V 0 
3-7 
3-8 
3-5 
3-0 
2-8 
2-3 
2-3 
2-8 
ifecm log 6/a = 3 • 03. 
V cm./sec. 
5-4 
7-5 
9-0 
9-7 
11-0 
10-7 
12-5 
17-6 
Wire No. IV. 
•17 
•38 
•66 
•95 
1-29 
1-67 
206 
2-49 
d = -02508 cm. 
log b/a 
2-15 
2-28 
2-26 
2-40 
2-46 
2-53 
2-63 
2-70 
Vo 
3-6 
3-2 
3-2 
2-8 
2-7 
2-5 
2 - 2 
2-1 
ifefflA log 6/a = 2 • 43. 
V cm./sec. 
5-2 
6-3 
8-2 
9-0 
10-6 
11-7 
11-9 
13-2 
Wire No. V. 
•22 
•51 
•85 
1-28 
1 • 71 
2-22 
2-85 
3 50 
d = ‘0510 cm. 
log b/a 
1-66 
1-70 
1-75 
1-78 
1-86 
1-91 
1-91 
1-92 
Vo 
2-8 
2-8 
2-6 
2-6 
2-4 
2-3 
2-3 
2-2 
ifea?i log 6/a = 1*81. 
V cm./sec. 
4-1 
5-5 
6-7 
8-4 
9-4 
10-7 
12.-5 
13-9 
H = 2™ 0 (<? - d 0 ) [1 + c(6- 0 o )]/[log 6/a], M = (0 - 0 O ) [1 + c (0 - d 0 )]. 
N = [1 + c (0 — $o)] 2 /[l + 6 (0 — 0 O )] 2 ) V = NV 0 , V 0 = KQe l ~vl(so<rob). 
Analysis of Langmuir’s Observations on Free Convection jrom Small Platinum Wires. 
