270 
CAPTAIN NOBLE AND MR. F. A. ABEL ON FIRED GUNPOWDER. 
Experiment 162.—Exploded 150 grs. mining. 
O 
Temperature of calorimeter before explosion . 56 - 80 F. 
„ „ after ,. . 60*82 „ 
Hence difference.4°*0'2 + 0°'20 = 4*22 ,, 
Hence heat evolved=507*9 gramme-units centigrade. 
Experiment 163.—Exploded 150 grs. Curtis and Harvey’s No. 6. 
O 
Temperature of calorimeter before explosion . 52‘80 F. 
„ ,, after „ . 58*65 „ 
Hence difference.5°*85-|-0 o *24 = 6*09 „ 
Hence heat evolved= 732*9 gramme-units centigrade. 
Experiment 164.—Exploded 150 grs. F. G. 
O 
Temperature of calorimeter before explosion . 5 7 *42 F. 
„ „ after „ . 63*26 „ 
Hence difference.5°*84-|-0 o *24 = 6*08 ,. 
Hence heat evolved =731*7 gramme-units centigrade. 
Experiment 165.—Exploded 150 grs. Spanish. 
° 
Temperature of calorimeter before explosion . 55*70 F. 
,, 5 , aftei ,, . 61 72 „ 
Hence difference.6°*02-f-0°*24= 6*26 „ 
Hence heat evolved =753 *4 gramme-units centigrade. 
Experiment 166.—Exploded 150 grs. pebble. 
O 
Temperature of calorimeter before explosion . 61*12 F. 
„ „ after „ . 66*80 ,, 
Hence difference.5°*68 + 0°*22= 5*90 „ 
Hence heat evolved = 710*0 gramme-units centigrade. 
o O 
Experiment 151.—Exploded 200 grs. mining. 
O 
Temperature of calorimeter before explosion . 60*38 F. 
„ „ after „ . 65*87 ,, 
Hence difference.5°*49 + 0'*22= 5*71 ,, 
Hence heat evolved = 512*7 gramme-units centigrade. 
Experiment 152.—Exploded 200 grs. Curtis and Harvey’s No. 6. 
O 
Temperature of calorimeter before explosion . 64*95 F. 
,, „ after „ . 73*00 „ 
Hence difference.8°*05 + 0°*32= 8*37 ,, 
Hence heat evolved = 755*7 gramme-units centigrade. 
