THE TABLES AND DIAGRAMS 



Explanation of the Tables. - - Tables I and 2 give the properties of 

 saturated steam and Table 3 the properties of superheated steam. Tables 

 7, 8, and 9 give similarly the properties of saturated and superheated 

 ammonia 



In Table 2 the temperature is taken as the argument and the tabular 

 values were calculated directly from the general equations. The value- 

 in Table i, in which the pressure is the argument, were obtained by 

 interpolation from Table 2. Below atmospheric pressure, the pressures 

 in Table I are given in inches of mercury, and from 0.2 to 5 inches 

 the interval i- taken as o.i inch. Hence the properties associated with 

 the low pressures involved in modern condenser practice may be easily 

 determined 



The upper limit of the range of temperature for which the general 

 equations may be considered valid is apparently about 560 F. However, 

 itivc values of the various properties between 560 degrees and the 

 critical temperature are given in Table 2. These were obtained by cer- 

 tain empirical methods that are described in the original paper. (See 

 Bulletin No. 75, Eng'g Exper. Station, U. of 111., pp. 61-64.) While 

 experimental evidence is lacking for temperatures above 400 F., it is 

 believed that the values between 400 and 560 degrees are fairly accurate. 

 Those for temperatures above 560 degrees are not so worthy of confidence. 



In the case of superheated steam, the properties are functions of both 

 pressure and temperature. Table 3 is so arranged that the properties 

 for eight successive pressures appear on each page. The temperature 

 rather than the degree of superheat is taken as the variable. Ten- 

 degree intervals are used up to about 200 degrees of superheat and 

 5O-degree intervals beyond. Under each pressure is given in parentheses 

 the corresponding saturation temperature so that the degree of super- 

 heat if desired may be readily obtained by subtraction. 



Table 4 gives corresponding temperatures and pressures of saturated 

 steam near atmospheric pressure. In other words, the table gives boil- 

 ing points for various barometer indications. 



Table 5 gives the important thermal properties of water. At the 

 lower temperatures the values of density and volume were taken from 

 the most reliable existing data. The specific heat throughout and the 

 other properties at higher temperatures were recalculated. 



Table 6 gives the more important data of mixtures of air and satu- 

 rated vapor of water. It will be found useful in the solution of prob- 



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