( 25 ; 



Wc see Ihat llic viiliie calculated for O is considcrablj liigjier than 

 the normal value 1,08 and that « is also again excessively high. 

 In order to get a survey of the decfvee of the devialion from liie 

 Iheorelical course we will perform here the calculation of c(|uatioii 

 (J) with these values of 0, a and v. (see table j). 26). 



This had agreement does not improve considerably if we determine 

 (\ n and /' from other vahies of ,<■, for instance from ,/■=(), liO, .(:=(),(;! 

 und , ('^0,1)3. For these values of ,i: we find : 



6 = 1,326 ; « = 0,474 ; r= ~ 0,38, 

 so ^) lias come somewhat nearer to 1,08 and a is also somewlial 

 lower. It is true that the agreement for values of :i' below ,/=:0,30 

 has somewhat though not noticeably improved {l^ = — 70,3 for,r=i:0,J3 

 becomes now A= — 55,7) but the agreement for values of .t' higher 

 than ,rz=0,30 is in general still worse. So we find for instance foi- 

 .t'=0,47 for L the xiihw Z-=-f-8,5, whilst in iIr- above table we 

 found A=-f 2,G, etc. 



IV. For completeness' sake we shall draw attention to the two 

 very short meUing-point cur^'es of lead-sih'er and tin-silver. We may 

 easily calculate the quantities from the data of the two eutectic 

 points. As namely these liiies may be considered to be straight, \\g 

 find (^ immediately from 



7\ — 7' 



d^-" — -. 

 T,v 



We have for lead-silver: 

 7;=:327,6 + 273,2 = 600,8 ; 7 = 303,3 f 273,2 = 576,5 ; .« = 0,0385 ±, 

 therefore 



Iience 



24,3 



0= — = 1,005, 



576,5X0,0385 



7v'7'„ 2X600,8 ^ _, 



7„ = -=z-^^ — -z= 1007 (ir. eal. 



^" 1,095 



Person found q^=:ö,'S(M)y^'2()i),d=^l[i\ (xr. eal. The agreement 

 appears to l)e nearly perfect. From this follows that .silrer, soUcd 

 in lead, occurs in it as atom, at least for small concentrations. 



As to the melting-point curve tin-silver we have for it : 

 7'„ = 232, 1+273,2 = 505,3 ; 7' = 221,7-f 273,2=494,9 ; a- = 0,0385±. 



We find therefore : 



10,4 _, . 



0= == 0,546, 



494.9X0,0385 



and 



