142 



MILLIKAN— METEOROLOGICAL WORK 



consisted in developing with the aid of the large amount of data 

 available, a general formula for the rate of ascent in terms of the 

 ascensional force and the weight to be lifted, which though far 

 from accurate is more reliable than that which has heretofore been 

 used. The formula heretofore used is that of Dine's, namely, 



4oafi| 



[^ 3000! 



M 0- s 



Hazeihiirit f .cli. L.L..N.VLi 



October Zl , la I a 3 0'. 



-xaimple Skou/vnq Ctvect 



a 



2 4 6 a 10 12 1+ 16 18 ^Q ^^ n k, ze so 



Correction currents at low altitudes. 



in which V represents the rate of ascent in meters per minute, / is 

 the free lift, or the weight of the displaced air less the weight of the 

 balloon and contained hydrogen, L is the weight of the balloon plus 

 the free lift and A' is a constant. 



The formula as modified by the observers of the Signal Corps is 



