Thermodynamic Properties of Air. 

 Now this is identical with 



309 



therefore 



r} = e 



V — 

 P 



1 + 16 .7 



(1 + 



%e) 



(?) 



' 1 + 16 . a pt iQ 



§ 17. Results. — The values of the function r)(p,6) might 

 he also obtained directly from experimental data. This will 

 be evident when we remark, that the quantity of air =M 

 (expressed in normal volume-units) contained, at a tempe- 

 rature 6 under p atmospheres, in a vessel of capacity s is 



M.=P S . 

 v 



I preferred to calculate the values of rj according to (7) 

 because it is easier to obtain values of the coefficient a free 

 from accidental errors than those of rj. The following table 

 contains values of the function r)(p, 6) calculated in the 

 manner indicated. 



Table of Compressibility of Air. 



00 



S s 



Temperatures. 



+ 100 



+ 16 



10587 







-35 



-78-5 



-103-5 



-130 



-135 



1 

 -140 -145 



1... 



1-367 



1-0000 



08716 



0-7119 



0-6202 



0-5229 



0-5046 



0-4862 0-4679 



10... 



1-3678 



] 0550 



09951 













... I ... 



15... 



1-3685 



1-0529 



9923 













0-4095 0-3786 



' 20... 



1-3691 



10509 



9897 





0-6778 



0-5697 



0-4410 





3808; 3447 



25... 



1-369811-0488 



9869 





6689 



5559 



4183 





3476 3015 



30... 



1-3704 



1-0468 



9842 





6599 



5417 



3936 



0-3502 



3063 2444* 



35... 



1-3713 



1-0449 



9816 





6510 



5270 



3650 



3115 



2419 



; 40... 



1-3725 



1-0433 



9793 





6423 



5125 



3329 



2598 



1128 





45 .. 



1-3738 



1-0419 



9772 



::: 



6335 



4980 



2963 



1942 







50... 



1-3754 



1-0408 



9754 



0-8288 



6252 



4839 



2544 



1605 







55... 1-3770 



1-0399 



9738 



8253 



6170 



4701 



2171 



1553 







60... 



1-3784 



1-0390 



9723 



8219 



6089 



4567 



2013 



1556 







65... 



1-3802 



1-0384 



9710 



8187 



6011 



4439 



1985 



1576 







70... 



1-3821 1-0381 



9701 



8158 



5937 



4318 



1989 









75... 



1-3842 1-0379 



9694 



8132 



5863 



4206 



2013 









80... 



1-3866 



1-0379 



9688 



8105 



5796 



4103 



2043 









85... 



1-3887 



1-0380 



9684 



8081 



5734 



4014 











90... 



1-3908 



1-0382 



9681 



8058 



5680 



3948 











95... 



1-3929 



1-0386 



9680 



8038 



5634 



3903 











100... 



1-3951 



1-0390 



9681 



8023 



5600 



3881 











105... 



1-3977 j 1-0397 



9685 



8013 



5568 



3874 











110... 



1-4004 



1-0406 



9690 



8006 



5544 



3877 











115... 



1-4034 



1-0418 



9699 



8004 



5530 



3892 











120... 



1-4065 



1-0432 



9710 



8006 



5520 



3914 











125... 





1-0448 



9722 



8012 



5520 



3944 











130... 





1-0467 



9738. 





5528 



3981 











* Corresponds to 29 atmos. 



