ON THE ENERGY OF STORMS MARGULES 591 



the base T 01 as for mass 2, i.e. ,303°, whence for the same altitude 

 h = 3633-29 meters we find 7\j and p 01 as follows: 



T 01 = 303° 

 h = 3633.29 



i T hl = 266°. 9061 p 01 = 773.4023 mm mercury. 



Final stage. For the final stage we compute the following values 



Pi =630-™ r i2 =297.1047° r;. t = 285.4593° 



V 2 B 



M- = c p o.ionp h .- 



B 



■M = 0.5334 p h — 



g 



V — 19.3 meters per second. 



The true average temperatures of the masses 1 and 2 in the 

 initial stage are T* i = 285. 9 and T* 2 = 296. 9 . 



If instead of the fictitious gas we had assumed dry air of the 

 same average temperature in chamber 2 and if its entropy had been 

 such that in the final stage 2' it lay uppermost spread over i' then 

 we should have computed the corresponding V = 18.5 meters per 

 second from the approximate formula (I) §(25). Therefore the 

 available energy is not much larger for the fictitious gas in chamber 

 2 than for dry air of the same temperature. 



With the above given equation for (Q) (see 2a, §36), we compute 

 the quantity of heat communicated, per unit area of the base of 

 the whole trough, to the mass 2 during its expansion 



(Q) Calories 



