8A ' D STEAM, AXD OTHER VAt'OKS. 7 



that <> little from those that will be given later. Some of the more 



re* :i system were calculated bj bis equations. 



Equation! for the Preeture of 8team at Paru. In view of the prscsdtof 



statements, it appeared desirable to re-calculate tbe oooetaoU for Equations 



B and C, with a degree of accuracy that nhould exclude aoj doubt aa to the 



of the reaulta. Accordingly, the logarithm* required were taken 



from Vega's ten-place table, and then tbe remainder of tbe cskwitstkms were 



carried on with natural numbers, checking by independent methods, with the 



vring results: 



B. For steam from 0* to 100* C. 



a - 4.7393622142. 

 log 6 -0.61 17400190. 

 log c - 8.1320378383 - 10. 

 log a - 9.996725532820 - 10. 

 lo-,y = 0.0068646759M, 



*-*. 



C. For steam from 100 to 220* C. 

 log p - a 60- + cf. 



a - 5.4574301234. 

 Iog6 = 0.4119787931. 

 logc = ' - 10. 



log a - 9.99741106346 - 10. 

 log-0.0< 113. 



t - 100. 



To show tbe degree of accuracy attained, the following tables are 



, : 



EQI 



^ LOO p FBOH TABLE LOO p CAI.CTLA1 



OF LOGARITHMS. BT EQIMTIOX. 



4.60 0.6627578317 



25 23.55 19909115 7199097 



. r >0 91.98 '636934052 1.96369346 



75 288.50 16014581: 2.46014587 



100 :: 2.8808135925 2.88081365 



EQUATION C. 



LOO p PROM TABLE LOO p 

 OP LOGARITHM*. BT BO.I ' 



100 760.00 2.8808135928 



130 2030.0 3.3074960. 



4651.6 8.6676023618 B.fS7M 



190 9426 3.9743274354 



17390 4.2402995820 4.24029957ft 



