METEOROLOGY — THEORY 217 
Since g is not strictly constant (it varies slightly with 
height and locality) and since #, to a slight extent, is 
dependent on the percentage of water vapor in the 
air and, finally, since 7 may be an arbitrary function 
of height, this differential equation cannot be inte- 
grated exactly. However, a careful consideration of the 
order of magnitude of changes in the pressure brought 
about by the slight changes of g and RF leads to the 
conclusion that such variations may be neglected, 
particularly as these changes have practically no effect 
on the slopes of M curves. Picking the best overall 
values of g and R (g = 9.80665 and R = 287.05 in 
the units used in this report) gives « = g/R = 
0.034163 as the value to be used in equation (8). 
The variation of temperature with height cannot, 
however, be neglected in the integration of equation 
Taste 10C. wu for h from 150 m (492.1 ft) to 500 m (1,640 ft); I’ from 250 to 340. Values to be subtracted from |" to 
obtain Fp = (n — 1) 108. 
\F 
h (in) 250 260 270 280 290 
150 
175 
200 
225 
250 
275 
300 
325 
350 
375 
400 
425 
450 
475 
500 
300 310 320 330 340 vA (ft) 
Taste 10D. uw for h from 150 m (492.1 ft) to 500 m (1,640 ft); F from 340 to 420. Values to be subtracted from F to 
obtain Fp = (n — 1) 106. 
\ F 
h (m) 340 350 360 370 380 
Ti 
390 400 410 420 h (ft) 
492.1 
574.1 
656.2 
738.2 
820.2 
902.2 
984.3 
1,066.0 
1,148.0 
1,230.0 
1,312.0 
1,394.0 
1,476.0 
1,558.0 
1,640.0 
Taste 10E. w for h from 150 m (492.1 ft) to 500 m (1,640 ft); F from 420 to 500. Values to be subtracted from F to 
obtain Fp = (n — 1) 108 
F 
h aN 420 430 440 450 460 
150 
175 
200 
225 
250 
275 
in (ft) 
492.1 
574.1 
656.2 
738.2 
820.2 
902.2 
984.3 
1,066.0 
1,148.0 
1,230.0 
1,312.0 
1,394.0 
1,476.0 
1,558.0 
1,640.0 
470 480 490 500 
