OF THE ALLOYS OF COPPER AND ZINC. 539 
Table IV. — continued . 
Percentage 
of copper 
in alloy. 
Weight of 
alloy in 
grammes. 
Rise in 
tempera- 
tiu’e ° C. 
Calories 
per gramme 
of alloy. 
Mean calories 
per gramme 
of alloy. 
Calories per gramme 
of mixture calcu¬ 
lated from Tables 
1 . and 11. 
Heat of for¬ 
mation of one 
gramme of 
alloy. 
24-32 
-7314 
-4842 
1-201 1 
-797 1 
707 
709 
70S 
745 
37 
28-18 
-4496 
-5418 
-702 
-849 i 
673 
675 
674 
716 
42 
32-05 
-5964 
-6745 
-879 
-987 
6.35 
631 
633 
687 
54 
1 
35-53 
-6846 
-7266 
-969 
1-0275 
610 
609 
609-5 
661-5 
52 
36-0 
-5983 
-7822 
-845 
1-109 
609 
611 
610 
658 
48 1 
1 
38-7 
-8118 
-8053 
1-1065 
1-101 
587 
589 
588 
638 
50 j 
40-4 
-41 
-6105 
-5514 
-816 
580 
576 
578 
625 
47 
41-8 
-5872 
-7318 
-779 
-9608 
572 
569 
570-5 
614-5 
44 
42-7 
-6746 
-6612 
-882 
•858 
563 
560 
561-5 
607-5 
46 
43-9 
-5193 
-4933 
•669 
•633 
555 
553 
554 
599 
45 
45 - 29 
-5615 
-7075 
•7 
•89 
537 
542 
539 
588 
49 
47-85 
-7126 
-8039 
•866 
•979 
524 
525 
524-5 
569 
44-5 
50-91 
-5037 
' -6872 
•5826 
•797 
498 
499 
498-5 
546-3 
48 
62-27 
-6733 
-5558 
•6646 
•543 
424-4 
419-5 
422 
461 
39 
66-8 
-8669 
-9568 
•7815 
•88 
389 
396 
392*5 
427-5 
35 
72-05 
-7952 
-9008 
i 
•654 
•7315 
354 
349 
351-5 
387-5 
36 
82-18 
1-4359 
-844 
•954 
•564 
286 
288 
287 
312 
25 
88-92 
1-2681 
-8568 
•715 
•489 
243 
246 
244-5 
262 
17-5 
3 z 2 
