142 Introduction to Boileau's Hygrometric Tables. [No. 147. 



Here (t—t') = 4°.8; enter Table I, under this head, and take out 



numbers as follows, for 23*000 ins. 



04221 



100 



18 



♦004 



•1 



01147, (f-Oxffc for, 23-104 



•04240 



Correction for/' (Table II) for 4°.8 and 23°.7 



•27 



(a) = -01147 (t-0 X^=£ 



04213 



a/10 .. .. 00421 





a/300 .. .. -00014 Sum 



435 



(a) Corrected for reading of wet bulb below 32°=diff. 



♦0377# 



/' (Table III) for 23°7 



14779 



/" = 



11001 



t" = 15°.7 



The computed value of/" using the co-efficient for values of t' be- 

 low 32° F. would have been '11003, and the difference in the tempe- 

 rature of the dew-point from the approximate value obtained above, 

 is not equal to the 200th of a degree of Fahrenheit. 



J. T. Boileau. 



