162 



PHILOSOPHICAL TRANSACTIONS. 



[anno 17Q7. 



Table I. Experiments on the Force qfjired Gunpowder, 



No. 

 47 

 48 

 49 

 50 

 51 

 52 

 53 

 54 

 55 

 56 

 57 

 58 



59 

 60 

 6l 

 62 

 63 

 64 

 65 

 66 

 67 

 68 

 69 

 70 

 71 

 72 

 73 

 74 

 75 



76 



77 



78 



79 

 80 

 81 

 82 

 83 



84 



85 



Time when the Expe- 

 riment was made, 

 1793. 



2d Mar. 



5th 



6th 



9 30 

 10 30 



9th 



11 

 11 

 3 

 3 

 3 

 3 

 4 



9 

 9 



10 





 30 





 15 

 30 

 45 









 30 







10 30 



10 45 



11 



11 

 11 

 11 



15 

 30 

 45 



11th 



12 15 

 9 



9 

 9 



4th Apr. 3 

 3 

 3 

 3 



5th 3 



15 

 30 





 15 

 30 

 45 







3 30 



4 



State of the 

 Atmosphere. 



F. 



50' 



52" 

 32° 



36° 



42" 



43' 



43* 



70< 



The Charge of 

 Powder. 



Eng. In 

 28.32 



28.33 



28.2 



28.34 



28.3 



28.31 



28.3 



28.2 



68" 



< 



Grs. 



9 



10 



n 



IS 



13 



14 



15 



16 



18 



as a 



rt rt O 



§« ., 

 OS 



Parts. 

 351 



390 

 429 



468 



507 



546 



585 



624 



28.3 17 663 



702 



Weight employed to 

 confine the elastic 

 Fluid. 



In lbs. 

 avoirdu- 

 pois. 



lbs. 

 1209.4 

 1142.3 

 1456.8 

 1329.9 

 1387.5 

 1708.2 

 1646.2 

 1615.2 

 1634 

 1943.3 

 1932.2 

 1907.4 

 1878.4 

 1895.1 

 2142.7 

 2204.6 

 2266.5 

 2390.3 

 2422 

 3213 

 3093 

 296S 

 2846 

 29C 8 

 2939 

 2951 

 3750 

 3508 

 34f7 



4037 



4284 

 4532 

 5027 

 5138 

 5262 

 5220 

 8081 



8081 



8700 



In 



Atmos- 

 pheres. 



1551.3 

 1884.3 



2219 



2573.7 



3288.3 



400 S 



4722.5 



7090 

 10977 



General Remarks. 



Not raised. 



Weight just moved, no report. 



Not raised. 



Raised, loud report. 



Weight just moved, no report. 



Not raised. 



Not raised. 



Raised, with a weak report. 



Weight just moved, no report. 



Not raised. 



Not raised. 



Weight not raised. 



Raised with a loud report. 



Weight just moved, no report. 



Raised with a loud report. 



Ditto, ditto. 



Ditto, ditto. 



Raised, report weaker. 



Weight just moved, no report. 



Not raised. 



Not raised. 



Not raised. 



Raised, with a loud report. 



Raised, report weaker. 



Ditto, report still weaker. 



Weight just moved, no report. 



Not raised. 



Not raised. 



Weight just moved, no report. 



{The weight was raised with a 

 loud report. 

 Raised, loud report. 

 Ditto, ditto. 

 Ditto, ditto. 

 Raised, report weaker. 

 Not raised. 



Weight just moved, no report. 

 Not raised. 



( The weight was raised with a very 

 < sharp report, louder than that of 

 ( a well loaded musket. 

 ( The vent tube of the barrel was 

 J burst, the explosion being at- 

 l. tended with a very loud report. 



That a clear and satisfactory idea may be formed of the results of these experi- 

 ments a figure is drawn, in which the given densities of the generated elastic fluid, 

 or, which amounts to the same thing, the quantities of powder used for the charge, 

 being taken on a line ab, from a towards b, the corresponding elasticities, as 



