BAUUS J VISCOSITY OF GASES. 271 
were found, are inserted, as well as the corresponding values ot 
computed for them by using Holinan's equation, 
zL =1+0.002751^-0.00000034^. 
I also insert the pressure P, at which the gas enters the platinum 
capillary. 
Table 90. — Successive values of r/ . 
Gas. 
Date. 
e 
. v x 10 6 
n-4 
_!?$_ x 10 6 
i +4 
P 
Mean r] x 10« 
H 2 .... 
March 26 

7 
133.3 
130.8 
123. 3 
H 2 .... 
March 23 
8 
130.4 
127.5 
125. 1 
H 2 .... 
March 21 
8 
132. 3 
129.4 
122.2 
H 2 .... 
March 20 
8 
132.6 
129. 7 
122.5 
Air... 
March 26 
7 
254.8 
250.0 
125.5 
Air . . 
March 20 
8 
254.7 
249.2 
123.4 
H 2 .. 
. 129.4 
Air ... 
...do 
7 
252.9 
248.1 
124. 
Air . . 
. 249.1 
Air . .. 
March 19 
6 
251.2 
247.2 
125.3 
Air... 
March 18 
5 
250. 
246.5 
123. 1 
Air... 
...do 
5 
250.2 
246.7 
123.4 
Air . . . 
March 15 
5 
251. 4 
247.9 
125.2 
Air . . . 
...do 
'5 
251.2 
247.7 
125.1 
Air . . 
. 247.2 
H 2 ... 
March 14 
5 
144.9 
142.9 
124.3 
H 2 .... 
...do 
5 
144.2 
142.2 
124.0 
H 2 .... 
March 13 
6 
142.6 
140.4 
124.0 
H 2 
...do 
6 
143.1 
140.9 
123.8 
H, 
141.6 
H 2 .... 
March 10 
7 
142. 7 
140.0 
125.0 
-*- L 2 • • 
H 2 ... 
...do 
7 
142.5 
139.8 
125.4 
H 2 .... 
March 9 
7 
141.5 
138.8 
126.3 
H 2 .. 
139.5 
H 3 .... 
March 8 
6 
141.8 
139.6 
125.0 
H 2 . . . . 
...do 
6 
141.8 
146.4 
88.7 
H 2 . . . . 
...do 
6 
140.4 
138.2 
124.6 
(Hj . . . 
146.0) 
H 2 ... 
...do 
6 
147.8 
145.6 
88.6 
H 2 ... 
138.9 
Air . .. 
March 7 
6 
254.8 
250.8 
124.5 
Air... 
...do 
6 
262.5 
258.5 
88.3 
Air . . 
. 250.8 
Air . .. 
March 3 
6 
255.5 
251.5 
124.2 
Air... 
...do 
6 
260.7 
256.5 
88.5 
(Air . . 
. 256.5) 
Air . . . 
...do 
6 
257. 7 
253.5 
124.7 
Air. . 
. 252.5 
DISCUSSION. 
Viscosity at zero. — It is expedient to begin this paragraph with an 
examination of the consecutive values of the zero-viscosity t/ of the sev- 
eral gases, since the constant ?/ must enter fundamentally into all the 
(925) 
