5 



determined under, or reduced to such conditions. The value of g, the 

 ration due to gn at Paris, latitude 48 50' 14' and 60 metre* 



above sea-level, 9.809218 metres; and at 45, and at lea-level, 

 9.806056 metres. Consequently, 760 ram. of mercury at 45 gives a 

 pressure equal to that of 759.755 mm. at Paris; and this corresponds 

 to a u mjNTuture of 9999i ' 



In < r.N. the thermometer which is standard at 45 has each 



degree 0.99991 of the length of the degree of a thermometer standard at 

 Paris. 



To reduce Equation B to 45 latitude, we have 



and for Equation C, 



The resulting equations which were used in calculating Table III are 

 B. For steam from o to 100 C. at 45 latitude, 



*i - 4.739502. 

 log 6 - 0.6117400. 

 log c - 8.13204 - 10. 

 log or, - 9.996725828 - 10. 

 log ?, - 0.0068641. 



it /. 



C. For steam from 100 to 220 C. at 45 latitude, 

 log p - a t - ft.a,- + c.ft-. 



, - 5-457570. 

 log 6 t - 0.4120021. 

 logf, - 7-74i68 - 10. 

 log a, - 9.997411296 - la 

 , - 0.0076418. 



fl / IOO. 



