BABUS.] 
VISCOSITY OF GASES. 
297 
97 to 99. This enabled me to reduce my relative data to the same 
standard as holds for the Tables 97 to 90. The diagram obtained fully 
corroborates all the inferences deduced. The obliquity of the lines 
decreases from low to high temperatures, i. e., in proportion as the 
velocity of the axis flow decreases. 
Apparent viscosity and temperature. — Considering these results as a 
whole, and representing the values of 7/ when P—p—0 as a function of 
temperature, 0", it appears that the curves lie farther away from the law 
?/'=iy t\-\-a6"'f in proportion as B is larger. Thus the results, 77, of 
Table 96, i£=0.008 cm , conform very fully with this law ; the results of 
Table 97, iv=0.01& cra , fall considerably below it, and finally the results 
of Tables 98 to 100 where R=0.025 cm lie in a very pronounced way 
below the former. As the bore is chosen larger, therefore, the effect 
of temperature becomes gradually less pronounced, and for R=0.025 cm 
the law falls even as low as 7/ / =?/ Vl+aO". On the other hand, as the 
bore is chosen smaller the curves ultimately (R=Q.Q08 cm ) coalesce with 
the law, v "=7 l0 (\+ad"f. 
Obliquity of the linear loci. — In Table 104 1 give a perspicuous view of 
the observed obliquity of the lines in Fig. 54, p. 304, cp being the angle of 
these lines with the horizontal relatively expressed. The temperature 
77" 
of transpiration being 6", the value — in the table is computed from 
Z- = {l+a6")i. %- however is computed from Fig. 54 when P—p=0. 
Table 104. — Transpiration of air in wide tubes. 
6" 
li 
tan (/> 
-q" 
WJ x io 6 

0.008 
1.00 
20 
1.00 
240 
977 
(Table 96) 
2.79 
(00) 
2.77 
6G8 
4 
0.018 
1.02 
314 
1.02 
223 
100 
(Table 97) 
1.10 
298 
1.23 
244 
625 
1025 
4 
2.14 
2.65 
1.02 
64 
7 
461 
2.23 
2.84 
1.02 
474 
587 
225 
0.025 
675 
(Table 99) 
1.81 
228 
2.30 
404 
8C5 
1000 
7 
2,06 
2.38 
1.03 
166 
30 
488 
2.60 
2.80 
1.03 
458 
531 
228 
0.025 
1050 
(Table 100) 
2.13 
128 
2.88 
478 
1280 
*8 
2.50 
44 
274 
3.20 
560 
198 
0.018 
18 
(Table 108) 
012 
(Table 107) 
92 
100 
•r{ 
I 
124 
245 
\ 
"Air. 
fHydrt 
gen. 
(951) 
