Manchester Memoirs^ Vol. xlviii. (1904), No. 0. 



Specific heat 

 found. 



Specific heat 

 calculated. 



•0784 (exp. l) 

 •07855 (exp. 2) 



•0786 (a) 

 •0787 {b) 

 •07885 {c) 



The atomic weights assumed for the calculated value 

 {c) are Cu 63'6, Sn 1 190. In preparing the alloy a slightly 

 higher proportion of tin than that required by the formula 

 was taken (387 per cent, instead of 38'4 per cent.) : an 

 analysis gave 38"94 per cent, of tin. 



The experimental and calculated specific volumes are 

 shown in the next table. The value found is in fair 



Specific volume 

 found. 



Specific volume 

 calculated. 



•II2I (I7«) 



•1249 {a) 

 •1248 {b) 

 •1248 {c) 



agreement with that recently given by Maey,* but, as this 

 writer points out, some of the earlier measurements for 

 copper-tin differ considerably. I therefore prepared a 

 second specimen of the alloy, using a slightly smaller 

 excess of tin and cooling the molten alloy more slowly. 

 This specimen gave for the specific volume •11J9 (17°). 

 Thus the contraction is io*2 per cent, (first specimen) 

 or 10-3 per cent, (second specimen). 



*Zeitschr. Phys. Chem., 1901, Vol. 38, p. 291. 



