VOL. LXXXVII.] 



PHILOSOPHICAL TRANSACTIONS. 



16-1 



Table I. Experiments on the Force of fired Gunpowder *. 



Time when the Expe- 

 riment was made, 

 1793. 



23d Feb. 9 

 9 30 



25th 



9 

 10 15 



10 30 



11 



3 Opm 

 3 15 

 3 30 



3 45 



26th 



4 



9 

 9 

 9 

 9 



10 

 3 











15 



30 



45 











3 15 

 3 30 



27 th 



28th 



3 

 4 

 3 

 3 

 3 

 3 



9 

 9 

 9 

 10 

 3 



3 

 3 

 3 



1st Mar. 9 



2d 



45 

 

 

 15 

 30 

 45 

 

 15 

 30 

 

 

 15 

 30 

 45 

 

 15 

 30 

 

 15 

 30 

 45 

 

 15 

 

 15 

 9 30 

 9 45 



State of the 

 Atmosphere. 



The Charge of 

 Powder. 



F. 

 31° 



37' 



57° 



34< 



48" 



50« 



34< 



48* 



34° 



59* 



50° 



Eng. In 



28.58 



28.56 



28.37 



28.1 



28.31 



28.36 



28.32 



28.35 



28.34 



28.32 



Grs. 

 1 

 2 

 3 

 4 

 5 

 6 

 1 



§0^ 

 -■S"S 



Parts. 



39 



78 



117 



156 



195 



234 



39 



78 



117 



156 



195 



273 



312 



351 



Weight employed to 

 confine the elastic 

 Fluid. 



In lbs, 

 avoirdu- 

 dupois. 



lbs. 

 504.8 



14.16 



26.5 



38.9 



51.3 



57.4 

 163.5 

 124 

 130.5 

 133 

 134.2 

 186.3 

 198.7 

 204.8 

 208.5 

 212.24 

 269.2 

 274.13 

 277.9 

 281.57 

 319.68 

 351.37 

 400.9 

 475.2 

 443.5 

 425.65 

 419.46 

 413.27 

 535.79 

 548.14 

 560.52 

 572.9 

 585.28 

 597.66 

 690.52 

 752.42 

 783.37 

 876.22 

 845.19 

 857.64 

 S61.65 



In 



Atmos- 

 pheres. 



685.6 



77.86 



1S2.3 



288.2 



382.4 



561.2 



811.7 



1164.S 



General Remarks. 



( The generated elastic fluid was 

 < completely confined, the weight 

 I not being raised. 

 Ditto. 



Ditto, weight not raised. 

 Ditto, ditto. 

 Weight just moved. 



In these 3 experiments the weight 

 was raised with a, report as loud 

 as that of a pistol. 



{But just raised, report much 

 weaker. 

 Weight hardly moved. 

 Not raised. 



Raised with a loud report. 

 Ditto, the report weaker. 

 Ditto, the report still weaker. 

 Weight but just moved. 

 Raised with a loud report. 

 Ditto, ditto. 

 Ditto, report weaker. 

 Raised, report weaker. 

 Weight just moved, no report. 

 Raised with a loud report. 

 Ditto, ditto. 

 Ditto, report less loud. 

 Weight just moved, no report. 

 Raised, loud report. 

 Ditto, ditto. 

 Ditto, ditto. 

 Not raised. 

 Not raised. 

 Not raised. 

 Not raised. 



Weight but just moved. 

 Raised with a loud report. 

 Ditto, ditto. 

 Ditto, ditto. 

 Ditto, ditto. ' 

 Ditto, report weaker. 

 Weight just moved, no report. 

 Raised, report very loud. 

 Ditto, ditto. 

 Ditto, ditto. 

 Not raised. 



But just raised, report weak. 

 Weight just moved, no report. 

 Raised with a loud report. 



* The last preceding note is equally applicable to all the experiments in this table, as the percussive 

 ©r initial force of the elastic fluid should be compared to, or measured by, the opposed weight or pressure. 



VOL. XVIII. 



