26 



A. W. "Witkowski on the 



the results obtained in Part I. Through the origin of the 

 diagram of compressibility (Part I., plate ii.) draw any 

 straight line. The intersections of it with the isothermals 

 pv = const, mark evidently a series of pressures corresponding 

 to the respective temperatures, and satisfying the condition 

 v = const. ; it is supposed that v = l when # = 0°, and the 

 pressure is atmospheric. Using the original diagram of pv, 

 I determined in this manner the constant volume relation of 



p and 6 for several densities of air, from v= t-t to V — -^K7\' 



The results are given in the following table. 





1 



1 



1 



1 



1 



1 





10 



20 



25 



30 



40 



50 



e. 





Press 



ure in atmospheres 







+ 100 



13680 



27-41 



34-28 



41-17 



55-08 



6909 



+ 16 



10542 



2101 



26-20 



31-38 



41-70 



5210 







9-919 



19-80 



24-68 



29-54 



39-20 



48 74 



- 35 



8-640 



17-12 



21-30 



25-44 



33-67 



41-70 



- 78-5 



7005 



13-76 



17-05 



20-30 



26-64 



32-75 



-103-5 



6-065 



11-82 



14-60 



17-28 



22-48 



27-40 



-130 



5-055 



9-71 



11-90 



1400 



1799 



21-65 



-135 



4850 



9-26 



11-32 



13-29 



16-98 



20-35 



-140 



4-668 



8-87 



10-82 



12-65 



1614 



19-29 



-145 



4466 



8-43 



1025 



11-95 



15-10 



1797 





1 



1 



1 



1 



1 



1 



v= 



60* 



80' 



100* 



120" 



150 



200' 



e. 





Pr 



assure in 



itmospher 



es. 





4-100 



83-28 



112-14 











4- 16 



62-34 



83 04 



10392 



125-41 











58-o3 



77-52 



96-80 



116-40 







- 35 



4970 



65 50 



8100 



96-40 



12000 





- 78-5 



38-65 



5006 



60 80 



7102 



85-83 



110-80 



- 103-5 



32-10 



40-88 



48-75 



56-U9 



66-13 



81-50 



-130 



25-08 



3103 



35 90 



39-95 



44-80 



5032 



-135 



23-40 



28-74 



32-90 



36-18 



39-60 



43-44 



-140 



22 08 



2674 



30-35 



3284 



3539 



37-80 



-145 



20-40 



24-50 



27 35 



29-12 



30-30 





