68 CAPTAIN NOBLE AND MR. F. A. ABEL ON FIRED GUNPOWDER. 
Experiment 14G.—Exploded 150 grs. Curtis and Harvey’s No. 6 . 
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Temperature of calorimeter before explosion . 61’50 F. 
5 3 33 aftei 33 . 67/833 
Hence difference. 6°'28+0°'24 = 6'52 ,, 
Hence heat evolved=784'0 gramme-units centigrade. 
Experiment 147.—Exploded 150 grs. Spanish. 
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Temperature of calorimeter before explosion . 65T0 F. 
„ „ after „ . 71'20 „ 
Hence difference.6°'10-|-0 o '24 = 6 '34 „ 
Hence heat evolved =762'5 gramme-units centigrade. 
Experiment 148.—Exploded 150 grs. Pt. L. G. 
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Temperature of calorimeter before explosion . 56'28 F. 
,, „ after „ . 62'07 „ 
Hence difference.5°'79 + 0°'24 = 6'03 „ 
Hence heat evolved=725'l gramme-units centigrade. 
Experiment 149.—Exploded 150 grs. pebble. 
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Temperature of calorimeter before explosion . 60'42 F. 
„ „ after ,, . 66T0 ,, 
Hence difference.5 o '68 + 0°'24= 5'92 „ 
Hence heat evolved = 711'9 gramme-units centigrade. 
Experiment 150.—Exploded 150 grs. F. G. 
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Temperature of calorimeter before explosion . 65'16 F. 
„ „ after ,, . 70'80 „ 
Hence difference.5 0 '64-bO°'23 = 5'87 „ 
Hence heat evolved = 706'45 gramme-units centigrade. 
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Experiment 153.—With 200 grs. pebble. 
Failure; the plug being spoiled by the explosion. 
Experiment 154.—Exploded 150 grs. E. G. 
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Temperature of calorimeter before explosion . 49\55 F. 
j, „ after ,, . 55'45 ,, 
Hence difference.59°'0 + 0°‘24= 6'14 ,, 
Hence heat evolved=738'9 gramme-units centigrade. 
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