T. Russell—Calbration of Thermometers. 375 
TABLE II. 
Values of 6; — 6; in 0°01 F. 
cu 122 167 
32 00 —03 —02 <7 
77 +03 00 —0O1 —02 
122 +02 +01 00 —03 
167 +07 +02 +03 00 
Sums +12 00 00 ae 
ee first column is composed of the following Mie m 
is the ohare of the interval 32° to 77°, d,,, 
Ws 77° to 122° and so 
fe 7 O32 = 00 
bsg — O77, = + 08 
b32 — Sigg = + 02 
Oso — S167 = + OT 
by summing, there results: 40,,—(4,..— 4.) = +12. 
The second column of table II is made up as follows: 
and by summing, as before; 40,,—(4,,,—4, 2) = 00. In like 
manner the other columns as similar ‘equations, and since 
a2 and J, are zero, we have 
46/419 by, = + 0°03 
407, = 00 67 = 
4 Oras — 00 122 = 
4 6167 =-—12 | chemo ee 0°-03 
by adding these patties of 6, the corrections at 77°, 122° and 
167° are found to be alike, and equal to s. 03. 
20°36 29°80 39°77 49°55 59°94 69°65 80°55 
42. 20°38 29°82 39°78 49°57 59°90 69°65 80°47 
52. 20°45 29°91 39°87 49°61 60°02 69°75 
ry “98 
Table IV is formed in the same way as table IL It will be 
— that there are two series of blanks rein tad to 
10° column of which the observations are wantin 
