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CAPTAIN NOBLE AND MR. F. A. ABEL ON FIRED GUNPOWDER. 
Experiment 176.—Exploded 400 grs. R. L. G. 
° 
Temperature of calorimeter before explosion . 67*12 F. 
„ „ after „ . 82*38 „ 
Hence difference.15°*26-f 1°*26 = 16*52 ,, 
Hence heat evolved =713*4 gramme-units centigrade. 
Experiment 177.—Exploded 400 grs. mining. 
O 
Temperature of calorimeter before explosion . 53*27 F. 
„ „ after „ . 64*13 „ 
Hence difference.10°*86-|-0 C *71 = 11*57 „ 
Hence heat evolved= 499*65 gramme-units centigrade. 
Experiment 178.—Exploded 400 grs. mining. 
O 
Temperature of calorimeter before explosion . 57*25 F. 
„ „ after „ . 68*27 „ 
Hence difference.ll o *02 + 0°*72 = 11*74 „ 
Hence heat evolved — 5 07*0 gramme-units centigrade. 
Experiment 179.—Exploded 400 grs. mining. 
0 
Temperature of calorimeter before explosion . 64*73 F. 
„ „ after ,, . 76*03 „ 
Hence difference.11°*304-0°*74=12*04 „ 
Hence heat evolved =520*0 gramme-units centigrade. 
Experiment 181.—Exploded 400 grs. Spanish. 
0 
Temperature of calorimeter before explosion . 51*62 F. 
,, ,, after ,, . 67*76 ,, 
Hence difference.16°T4 + 1°*32= 17*46 „ 
Hence heat evolved= 754*0 gramme-units centigrade. 
Experiment 182.—Exploded 400 grs. Spanish. 
O 
Temperature of calorimeter before explosion . 66*90 F. 
,, „ after „ . 83*21 „ 
Hence difference.16°*31 +1°*33= 17*64 ,, 
Hence heat evolved= 761*8 gramme-units centigrade. 
Experiment 183.—Exploded 400 grs. special mining. 
0 
Temperature of calorimeter before explosion . 52*72 F. 
„ ,, after ,, . 63*58 „ 
Hence difference.10 o *86-b0°*71 = 11 *57 „ 
Hence heat evolved = 499*65 gramme-units centigrade. 
