( 29 ) 

 - 1 == O, or — /()_,/ (1 -./•) = 2, 



from which wo find: ,/■=(), 805. If howcNcr a is not /cro, Hn'ii thi» 

 e(jiiali()ii /('ƒ/ (J —,/') = 2 tniiistbriiis (he al)()\<' (M|iiali(»ii into ilu; 



Ibllowiiig' one : 



or 



l-2n. = -^(l-f-n'0, 



i .7' 



which is only true, if 



1 

 2 



.V " 1,156 — 2 



r = = z= — 0,744. 



2— .^. 2-0,865 



We happened to lind exactly r = — 0,74 for tin-nierctiry, so — 

 if had been equal to oo — the point of inflection vvonld have been 

 found at ,i' = 0,865. 



JVec/ative values of & (or q„) are required in order to lind a i)()int 

 of inflection between that value of .v, for which we find the point 

 of inflection with ö=oo , and .i'=l. These negative values ^vill occur 

 very seldom, if at all. The principle result of the above investiiiatioji 

 is therefore that the melting-point curve — the case of mixed crystals 

 being excluded — will show a /)(>ijii. of injlt'dlon. if 



RJ\ «, 



or, being equal to and « to — , if 



"- - k 1U\ + a, > 0. 



'?» 

 i. e. if 



'7o< 



1---'"^ 



Rl\ 



As R, expressed in Gr. Cal., amounts to 2, the condilioii may 

 finally be written : 



4T„ 

 'Zo < (•^) 



1--^ 



where r/„ represents the latent heat (in Gr. Cal.) of the metal, which 

 is deposited in solid condition, 7„ the absolute melting temperature 



and «1 z=i a q^ = — , also expressed m Gr. Lai. 



