CAPTAIN NOBLE AND MR. F. A. ABEL ON FIRED GUNPOWDER, 
260 
Experiment 155.—Exploded 150 grs. It. L. G. 
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Temperature of calorimeter before explosion . 86‘00 F. 
„ „ after „ . 9173 „ 
Hence difference.5°73-f-0 o, 24 = 5’97 „ 
Hence heat evolved=718'4 gramme-units centigrade. 
Experiment 156.—Exploded 150 grs. pebble. 
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Temperature of calorimeter before explosion . 56’07 E. 
„ „ after „ . 61'95 „ 
Hence difference.5 c, 87 + 0 o, 23=: 670 ,, 
Hence heat evolved = 7 34 - 1. gramme-units centigrade. 
Experiment 157.—Exploded 150 grs. Spanish. 
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Temperature of calorimeter before explosion . 56'90 F. 
,, „ after „ . 63'06 „ 
Hence difference.6°'16 4-0°'2 5= 6'41 „ 
Hence heat evolved=771'4 gramme-units centigrade. 
Experiment 158.—Exploded 150 Curtis and Harvey’s No. 6. 
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Temperature of calorimeter before explosion . 57'92 F. 
,, „ after „ . 63'87 „ 
Hence difference.5°'95-|-0 o '24= 6'19 „ 
Hence heat evolved^ 744'9 gramme-units centigrade. 
Experiment 159.—Exploded 150 grs. mining. 
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Temperature of calorimeter before explosion . 58'50 F. 
„ „ after „ . 62'54 „ 
Hence difference.4°'04-f-0°'16= 4'02 „ 
Hence heat evolved = 505'5 gramme-units centigrade. 
Experiment 160.—Exploded 150 grs. R, L. G. 
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Temperature of calorimeter before explosion . 62'42 F. 
„ ,, after „ . 68'06 ., 
Hence difference.5°'64 + 0 o "24= 5'8S „ 
Hence heat evolved =707'5 gramme-units centigrade. 
Experiment 161.—Exploded 150 grs. pebble. 
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Temperature of calorimeter before explosion . 49'05 F. 
„ „ after „ . 54'59 „ 
Hence difference.5°'54-f-0 o '23= 577 ,, 
Hence heat evolved=69 4'4 gramme-units centigrade. 
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