416 
PROF. LOUIS YESSOT KING ON THE CONVECTION OF 
Table III. 
Specimen Observation Sheet , September 15, 1912. 
Air temperature, 16“ • 8 C. Relative humidity, 62 per cent. 
Wire No. 1. Diameter, O'01530 cm. Length between potential terminals, 23• 2 cm. 
Total length, 27 • 2 cm. Resistance per unit length at 17° C., 0 - 0582 ohms. 
R/Ri 
l 
1-727 
2-37 
2-965 
3-51 
4-00 
Temperature, 
degrees C. 
227 ° 
426 0 
627° 
817° 
1004 “ 
1-730 
2-40 
2-98 
3-54 
4-05 
r ohms 
■100S 
■1397 
■1733 
• 2025 
•2360 
T = 
17-63 sec. 
v. 
= 19-11 
1-40 
1-76 
2-02 
2 • 22 
2-44 
2ttL = 
337 cm. 
V 
= 17-4 
(1 ~0 = 
•912 
•T* 
= 4-17 
•198 
■435 
■70S 
1-000 
1-405 
T = 
6 ■ 84 sec. 
V, 
= 49-3 
1-615 
2-02 
2-29 
2-52 
2 • 72 
2?rL = 
337 cm. 
V 
= 45-0 
(i-o = 
•912 
s/V 
= 6-70 
■263 
•572 
■90S 
1-285 
1 - 745 
T = 
9-77 sec. 
V,. 
= 86-4 
1-81 
2-27 
2-50 
2-74 
2-92 
27tL = 
844 cm. 
V 
= 82-4 
(1-0 = 
•956 
= 9-07 
■ 331 
■721 
1-081 
1-521 
2-015 
T = 
9‘50 sec. 
V, 
= 174-8 
2-05 
2-54 
2-82 
3-08 
3-28 
27rL = 
1660 cm. 
V 
= 165-0 
(1-0 = 
•947 
VV 
= 12-83 
■m 
■905 
1-375 
1-925 
2-54 
T = 
5 • 55 sec. 
V, 
= 299 
2-33 
2-84 
3-17 
3-42 
3-64 
2ttL = 
1660 cm. 
V 
= 283 
(i-0 = 
•947 
s/V 
= 16-8 
•549 
1-127 
1-740 
2-370 
3-140 
T = 
3 *425 sec. 
V, 
= 485 
2-57 
3-08 
3-43 
3-70 
3-90 
2ttL = 
1660 cm. 
V 
= 459 
(1-0 = 
•947 
VV 
= 21-4 
• 667 
1-328 
2-030 
2-77 
3-60 
T = 
2 • 60 sec. 
V, 
= 638 
2-66 
3-25 
3-61 
3-89 
4-10 
2ttL = 
1660 cm. 
V 
= 603 
(i-0 = 
•947 
s/V 
= 24-55 
• 712 
1-480 
2-260 
3-07 
3-97 
T = 
1 • 954 sec. 
V, 
= 850 
2-86 
3-44 
' 3-81 
4-10 
4-32 
2rL = 
1660 cm. 
V 
= 803 
(1-0 = 
•947 
s/V 
= 28-3 
■825 
1-660 
2-525 
3-42 
4-41 
Constants B and C 
B 
= 0264 
•0508 
•0772 
•1012 
■ 1272 
in the formula 
IV = B JV + C 
C 
= 089 
•241 
•388 
•602 
•884 
determined from the line of closest fit. 
