( 375 ) 

 TJNE BC. 



lliis luajuKM-, iiioasiii-cnieiits of ilio A'. .1/. /•'. wi^vo also luade a( 25" 

 of anialganiH of O.OOi— iOO atom "/„ Sn agaiiisl aii aiiialgaiu of J(i 

 aloiu 7„. 



These measiii-eiiioiils led to the i-esiilts that tlio iiiisalui-alc»! aiiialuains 

 liave a /'J.M.F, i-isinu- with the amount of liii until al l.'i alom"/,, 

 satnratioii sets in. From this eonccMilratioii \\\> lo Dl) alom "/„ llie 

 potential remains nnchaniied, eoiise(|nenllv two phases of nnehange- 

 al)lc eo]ieenlration must exist !»et^^'een these limits; one of (hese is 

 the liquid one of 1.2 "/„, the othci- llic solid one containing Oil 

 atom 7n- 



At 25° Ihe ci'vslals deposited tlKM'el'ore consist of jiearly pure tin 

 which is the* case in a still greater degi'e(> at higliei' lemperalui'es. 

 1)\ a com|)arison of Ihe \alues of tli(> A'. .)/. /''. for amalgams of which 

 the w hole jnass was li(piid al 25'^ ajid 50' the heat of amalgamation 

 coidd he calculated. The inlroduction of 1 gram-atom of Sn into 

 a li(pii<l amalgam with 0.01 — 1.00 atom "/o S)i. thei-elore nearlv 

 j)ure Hg, al)soi-l»s ahoiil .'iOOO calories. 



The line ('/> may also he considered as Ihe line of the solutions 

 saturated with Sn. It lakes a \ery pecidiar course, llie pai't from 

 120° up to the melting point of liii is nearly siraight, ihe centre 

 part shows a x'eiy rapi<l increase of ihe soluhilily with ihe leinp(>- 

 I'alnre. the lower |>arl, liowe\-er, an exceedingly small ijicivase and 

 also an exceedingly small solid)ilily so llial the line approaches 

 very closely ihe llg-axis. In the loA\er pari of the lignre (p. .'^74) 

 this pari wilh its coin'se lowai'ds ihe uieJliuL:,' point ol" llg has heen 

 drawn on a larger scale. 



25^^ 



