I HI THKKMA1. PROPERTIES OF STEAM 

 SCHBBL AND REUSE 



o 



10 

 JO 



30 



40 



50 



4 |7f 



9.110 





M > 

 i , , - 

 3S.674 



5.685 



11.074 



11.989 



11.383 



6.54S 



71 *> 



13637 



47.58 



; 





-' 



HOLBOKN AM) IIKNNIXO 



HOLBORX AND BAUMANN 



Of the many formulas that have been proposed for the relation 

 P-f(t) between the pressure and temperature of saturated steam, a 

 number are simply modifications of the general equation 



logp- A + ~ + Clog r+ 



P+ FP4 



Tin number of constants may be increased indefinitely by taking 

 additional terms involving the higher powers of T. The signs of the 

 coefficients B, C, D t E, etc., may be either positive or negative. Many 

 of the proposed equations are simpler in form than the preceding, in 

 particular Bert rand's equations, which have been extensively used. 



