926 
In the following Table are given the results of three series of 
observations. For the meaning of the symbols employed reference 
may be made to the corresponding Table for hydrogen published in 
the paper just mentioned. 
Air. 
| 5, = 0.546 | | | 
Pressure Tem- by k a= OM, 0.509 1 g=0.472)) ¢= 0.436 1 — 0405, 
in | pera- Hele | 5 = me | zs aa 7 : 
atm. | ture. | e a Ne Te eo hae 
| Ce en loen Pee 
71.4 12.75°C.| 823.52 | 0.84350 | 1.07697 | 1.16423 | 1.26722 | 1.37179 
11.4 12.90 821.23 0.84346 1.07702 | 1.16418 | 1.26724 | 1.37176 
10.6 13.19 810.84 | 0.84352 | 1.07697 | 1.1642) | 1.26718 | 1.37175 
66.4 UIs 42 159.81 0.84350 1.07697 1.16419 1.26727 | 1.37183 
48.7 | 13.58 559.27 0.84352 | 1.07698 | 1.16421 1.26716 “1.31177 
31.9 13.67 359.50 0.84339 1.07701 | 1.16417 | 1.26725 | 1.37171 
| | | 
| Orla 0.25 790.70 0.84345 1.07697 116415 _ 1.26723 14 37187 
67.6 | 10.15 787.92 | 0.84349 | 1.07698 . 1.16419 | 1.26735 1.37191 
66.2 | 10.35 | 7166.84 | 0.84353 | 1.07695 | 1.16414 1.26724 1.37184 
49.2 ORS BOIS | Ons4s5l | L07169Se Sh alGall 26125 Rmss lS 
322 10.95 367.70 | 0.84350 | 1.07695 | 1.16414 | 1.26721 | 1.37175 
| 101.9 12.75 1170.71 0.84343 1.07698 | 1.16418 1.26729 11557203 
| 101.8 12.80 | 1168.50 0.84340 | 1.07699 | 1.16412 | 1.26732 | 1.37204 
| 100.0 13.03 1147.43 | 0.84338 | 1.07700 | 1.16419 | 1.26732 | 1.37204 
82.8 | 13.39 947.50 | 0.84337 1.07699 1.16415 | 1.26729 1.37207 
65.5 13.80 145.11 | 0.84339 | 1.07104 | 1.16427 1.26728 | 1.37206 
39.6 13.96 | 446.50 0.84328 1.07697 1.16415 | 1.26725 "1.37199 | 
The values obtained for the various gas densities are pretty well 
constant, just as was found to be the case with hydrogen. The 
deviations are not any more one way than the other, and we can 
therefore conclude that the dispersion of air is constant up to 
pressures of about 100 atm. 
