6 SCHMITZ, Specific Heats and Volumes of Certain Alloys. 



Aluminium Alloys. 



The following table shows the results obtained for 

 certain alloys of aluminium : 



Approximate 

 Composition. 



Specific Heat. 



Specific Volume. 



Found. 



Calculated. 



Found. 



Calculated. 



J Aluminium.. 80 1 

 (Copper 20/ 



•1935 (exp. 1) 

 •1935 (exp. 2) 



•194 {a) 

 •194 (b) 



•3224 (191°) 



•323 («) 

 •323 {b) 



j- Aluminium.. 60 1 

 (Copper 40) 



•1680 (exp. i) 

 •1672 (exp. 2) 



•169 {a) 

 •169 {b) 



•2675 (19!-) 



•272 {a) 

 •271 {b) 



* ("Aluminium.. 80 1 

 (Zinc 2oJ 



•1938 (exp. i) 

 •1943 (exp. 2) 



•193 («) 

 •194 {b) 



J-3264 (i8i°) 



•326 [a) 

 •328 {b) 



*(" Aluminium. .6o| 

 IZinc 40/ 



t*i7o (from five 

 experiments) 



•167 {a) 

 •169 {b) 



§•288.? 



■277 («) 

 •281 (b) 



[Aluminium.. 40) 

 (Zinc 6oJ 



Not 

 determined 



— 



•2349 (21F) 



•242 (a) 

 ■234 ii) 



r Aluminium.. 94] 

 (Bismuth 6) 



•21 19 (exp. i) 

 •2132 (exp. 2) 



•208 {a) 



•3651 (21°) 



•358 («) 



Commercial 

 Aluminium 



•1913 (exp. i) 

 •1922 (exp. 2) 



•200 (a) 



•3282 (141°) 



■338 («) 



* Prepared from a casting by the British Aluminium Company. 



+ In this case the specific heat determinations were not in good agree- 

 ment. Further observations are being made on certain peculiarities of the 

 specimen which appear to be connected with this want of agreement. 



X Determined after remelting and recasting the original specimen, which 

 had minute blow-holes throughout its mass. 

 Internal cavities suspected. 



