186 



Mr. T. R. Edmonds on the Elastic Force of 



Table II. — Elastic Force of Steam of Maximum Density, ac- 

 cording to new formula, compared with the Elastic Forces 

 indicated by the three elementary Tables from which the ad- 

 justed Table of M. Regnault has been formed. 



(The force is stated in millimetres of mercury. One atmosphere 

 equal to 760 millimetres = 29*9218 English inches.) 







Observa- 









Tempe- 

 rature, 

 Centi- 

 grade. 



New 

 formula. 



tions en- 

 graved on 

 copper, 

 "Graphic 

 Curve," 

 page 608. 



Biot formula 



(H), 



page 608. 



Roche formula 



(K), 

 page 6l5. 



Regnault 

 adjusted 

 Table, 

 page 624. 



_°30 



•371 



•37 



(Not stated.) 



(Not stated.) 



•386 



-20 



•920 



•91 



* -91 



* -91 



•927 



-10 



2111 



2-08 



1-97 



212 



2-093 







4-520 



4-60 



4-48 



4-60 



4-600 



+ 10 



9105 



9-16 



9-05 



9'22 



9-165 



20 



1737 



1739 



1730 



17-62 



17-39 



30 



31-58 



31-55 



31-50 



3204 



31-55 



40 



54-98 



54-91 



* 54-91 



55-71 



54-91 



50 



9206 



9198 



9202 



93-11 



91-98 



60 



148-82 



148-79 



148-83 



15019 



148-79 



70 



23303 



23309 



23311 



234-61 



233-09 



80 



354-51 



354-64 



354-64 



35606 



354-64 



90 



525-33 



525-45 



525-45 



526-42 



525-45 



100 



760-00 



760-00 



* 760-00 



* 760-00 



- 76000 



110 



1075-6 



1073-7 



1075-4 



1073-7 



1075-4 



120 



14920 



1489-0 



1491-3 



14871 



1491-3 



130 



2031-7 



2029-0 



2030-3 



2022-7 



2030-3 



140 



2719-9 



27130 



2717-6 



2705-6 



27176 



150 



3584-4 



35720 



3581-2 



3563-9 



3581-2 



160 



4655-6 



4647-0 



* 4651-6 



4628-5 



4651-6 



170 



5966-2 



5960-0 



5961-7 



5932-8 



5961-7 



180 



7550-8 



7545-0 



7546-4 



7512-9 



7546-4 



190 



94460 



9428-0 



9442-7 



9407-1 



9442-7 



200 



11690 



11660 



11689 



11656 



11689 



210 



14322 



14308 



14325 



14302 



14325 



220 



17383 



17390 



* 17390 



* 17390 



17390 



230 



20914 



20915 



20926 



20965 



20926 



The three formulae for log P above referred to are 



{/ / \ -1-302585-J 



1_M + 1\ L; a + ba' + cfr; and Atx (1 + M*)- 1 . 



* Assumed points of coincidence with observations marked on engraved 

 plate of copper. 



