( 393 ) 



dT =r e 



dt 



and 



2,C FdT 2i pdt 



Qe =z (j e 



Let LIS moreovei- still show this. 



d / dt\ dt' 



dt[dTj'^^'dT 



dT = 



dt 

 df 



dt 

 df 



+pdt= 



SO 



'S''"- .u -ƒ 



pdt 



dT 



or 



— fpdT —f pdt 



^ dT=e ^ dt. 



Furthermore we have 

 2 



'S''"' f'itv' !/'"" 



whilst 



so that 



dT 



W) - 7 ' 



2 CpdT 2 Cpdt 



To get dt^ and ^/, expressed in / and t we lia\e but to 

 start from the standard form {B), i. e. to put in (5) and (G) 



/ 



p z= — , q =z 1, (It = (It. So we find 



,//, = 



-hi 

 I 



dr 



Idx 



q,=e 



. . (7) 

 . . (8) 



