Dr. Matthiessen and M. von Bose on some Gold-Tin Alloys. 321 



150 grms. : in the second experiment the weight of the alloy was 

 about 250 grms., and the non-crystalline part weighed about 50 grms. 

 The addition of more tin did not cause any further separation into 

 two masses. The following Table gives the results of the experiments 

 made with the other alloys : — 



Composition of 

 alloy. 



Amount of gold Amount of gold 

 per cent, in first per centi m 

 crop of crystals . 



Amount of gold 



per cent, in 

 mother-liquor. 



41-8 Au \ 

 582 Sn J 



43-6 



2nd crop. 

 43-6 



40-8 



40-5 Au \ 

 595 Sn J 



42-9 



6 th crop. 

 38-7 





37-5 Au "I 

 62-5 Sn J 



39-7 



4th crop. 

 37-6 



32-9 



65-0 Au \ 

 35-0 Sn J 



37-5 



4 th crop. 

 32-6 



30-6 



32-5 Au 1 

 67-5 Sn J 



36-8 



4th crop. 

 35-2 



28-7 



30-0 Au \ 

 700 Sn J 



33-8 



6th crop. 

 315 



25-3 



25-0 Au \ 

 75-0 Sn f 



27-4 





201 



The weight of each of the alloys experimented with was generally 

 about 260 grms., and that of each crystallization on the average 

 40 grms. In the last alloy, crystals fit for analysis could only be 

 obtained in the first crystallization. The mother-liquor was, how- 

 ever, crystallized four times, and the last mother-liquor analysed. 



We are indebted to the kindness of Professor Miller of Cambridge 

 for the following determination of the crystalline form of the fore- 

 going alloys : — 



Description of the Crystals of Gold and Tin. 



O 2 I 



O O I 



O 2 I 



I 12 



