KODUCTION. 



and Mr. Short; * the results of the bitter's investigation have been com- 



municated for use in this book in anticipation of the publication of the 



Icted report. 



: T Knoblauch's report gives the results of the investigations 

 made under his dim lion in the form of a table giving specific heats at 

 various temperatures and pressures and in a diagram, which can be found 

 in the original memoir, and he also gives a table of mean specific heats 

 from tin- trinjHT.ituri- of saturation to various temperatures at several 

 pressures. This latter t.il.le is given here in both the metric system and 

 in the Knglish system of units. 



SPFrilir IIKAT OF SI PFRHKATED STEAM. 

 0/ 



*&J 



, -,:, 



I 



14.2 



N 



no 



Js I 



1-1. 



Ml 



141 



168 



n* IM 



10 



179 



no 



i-_> 



170 .ft 199 



it 



1 

 I* 



II 



W ''i'" ObM 



4..-; 







m 



B72 

 MI 



OKI 



KM. 



no 



UP 



Hij > ITS.. -,i:, 



It.J I 



J7.-.0 :^-ji :,{-.( .v^.i m 







o 



463 0.474 0.4M|0.514|0 









 I 



6S50.677 



M20 .".700 .ViSO nif0 IW5O AM 







IM 



517 n 00 > MID MOO HI 



. KM M -in.. |2 D 520 > 



The construction of this table is readily understood from the following 

 example: Required the heat needed to superheat a kilogram of steam 

 at 4 kilograms per square centimetre from saturation to 300 C. The 

 saturation temperature (to the nearest degree . ;C\; so that the 



steam at 300 is superheated 157, and for thi> is required the heat 



i ;; X 0.492 - 77.2 calo: 



The experiments of Professor Knoblauch were made at 2, 4, 6, and 8 

 kilograms per square centimetre; the remainder of the table was obtained 

 from the diagram which was extended by aid of cross-curves to the i 



Within the \\m\\^ of the rxjKTimcntai work the table may be 

 used with confidence, the greatest error being probably not more than 



Thcsb by Mr. Short, Cornell I'nimrity. 



