SATURATED STEAM, AND OTHER VAPOBS. 



A COMPARISON of the several table* of the properties of 



expressed in English unit*, reveals discrepancies of considerable magnitude; 



iventigaUon shows that, while all are in tome manner founded on tho 



inents of Regnaul: .* methods of calculation hare been need, and 



in some cases other c.\ al data have been employed. A review of 



the whole subject, in connection with the preparation of nptes on thermo- 



iiics for the use of the students of the MassachnsetU Institute of 



Technology, made it seem important to calculate a set of tables, to accompany 



those notes, (bunded on the best and most recent data. 



In IH< Hi-nting the tables for general use, it appears proper to state in full 

 the data and the methods of calculation employed, so that each one ma/ 

 ! degree of accuracy and correctness of the tables, and the reliance 

 to be placed on them. 



e properties of other vapors hare been added, which will be 



lKsriixsr.1 h.-i. :iftrr. 



Pressure of Saturated Steam. As a conclusion from all the 

 M tension of saturated steam, Rcgnault gives, in the 

 de France, etc., Tome A A/., the following data ? 



TEMPERATURE PRESSCBB 



MM. OP MP.RCVBT. 



-32 <>.:'.- 



-16 l. 



4. CO 



25 23.55 



50 91.98 



75 288.50 



100 760.00 



130 2030.0 

 4651.6 



2JO 17390. 



-20 0.91 



+40 54.91 



