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SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOL. 51 



76o mm ; io°, 7 do 111111 ; etc., and plot the results and thus obtain fig. 1, 

 which represents all these adiabats of the dry stage. 



The values of p and t for the dry stage, needed for the construc- 

 tion of this figure are contained in the following table I. 



Table I. Table for constructing the adiabats 

 of the dry stage 



Adiabats of the dry stage are segments of hyperbolic curves. 

 This system of curves enables us without any further labor to 

 deduce the associated values of pressure and temperature for any 

 given intermediate conditions with sufficient accuracy. 



In a similar way the adiabats of the condensation stage are drawn 

 by means of values that are given in table 7, page 490. 



Since the factor (w) varies for different mixing ratios in the 

 adiabat of the condensation stage, therefore each mixing ratio 

 corresponds to a special system of curves. But the error due to 

 the introduction of an average value m = 3.60 in the rain stage 

 (corresponding to an average quantity of moisture £ of 8 or 10 

 grams) is so small in comparison with the use of other values that 



