VOL. LXXI.J 



PHILOSOPHICAL TRANSACTIONS. 



93 



cu 

 x 



N° 



Grs. 



88 

 89 

 90 

 91 

 92 

 93 

 9* 

 95 

 96 

 97 



98 



99 



100 

 101 



102 



145 

 165 



290 



437 £ 



103 



104 



105 



106 



107 



108 



109 



110 



111 



112 



11 



114 



115 



116 



117 



118 



119 



120 



121 



122 



123 



The 



charge of 



powder. 



165 



104 

 145 



-a 



In. 



1.3 



1.45 



2.6 



3.9 



1.45 



21S 

 290 



.9 

 1.3 



In. 



Grs. 



a 3 



Inches. 



6'00 



603 



US4 



1754 



2352 



i.14 



1.8 

 2.6 



4371 



2.28 

 3.9 



2.6 



a 

 a, 



bp-g 

 .5 -a 



6.5 



6.34 



10.12 



13.65 



16.55 



1.68 

 6.7 



.65 

 .43 



.86' 



4.51 



5.4 

 5.6 



6.18 



8.48 



9-45 



8.73 

 93 



4h 



to "3 



Inches. 



Inches 



65.4 



64.6" 



65. 



63.4 



63.3 



2.6 



60.5 



uncert. 



63. 



65. 



6'5.8 



65. 



65.6 



65.2 

 65.6 



•3 '5 



■3 

 ° S 



o 



Ft.in 

 sec. 



8.85 



8.65 



8.5 



8.4 



9-15 

 10.56 

 11. 

 J0.5 

 10.3 5 

 10.65 



10.6 



15.22 



15.13 



21.92 



27. 18 



32.25 



4.3 



5.5 



5.6 



11.70 



17.5 



15.88 



17.9 



4.9 

 4.8 

 5.6 



10.6 



12.92 

 13.2S 



14.3 



19.68 



23.9 



22.8 

 23.4 



65.5 



64. 



63.6 



65. 



64. 



64.9 

 64.5 



65. 



63.6 



22.94 



23.7 



24.1 



23.8 



24.6 



33. 



33.3 



33.6' 



32.5 



33.2 



32.9 



17.9 



1229 

 1229 



978 

 916 



833 



Remarks. 



138 



92 



180 



732 



877 

 910 



990 



1380 



1526 



I Very few unfired grains of powder struck 

 ) the screen. 



( There were no marks of any unfired 

 ( powder having reached the screen. 



The screen was taken away. 

 ( The whole surface of the target was 

 ( bespattered with unfired grains of powder. 



The pendulum was not observed. 

 1 In each of these experiments near J^ part 

 j of the substance of the bullet was melted 

 \ and blown away by the impulse of the 

 (.flame. 



9th day. 



{About 40 grs. of powder were driven 

 through the screen, 

 j About 40 unfired grs. of powder. Medium 

 \ velocity 894. 40 unfired grains. 



{Double proof Battle powder; no unfired 

 grains. 

 Ditto, ditto. 



Government powder: bullet leathered; 



weight 602 grains. 

 Bullet naked; very few unfired grains. 



1419 



1460 



1462 



1436 



1438 



1423 



1378 



152 



1738 



1824 



1729 



17061 ) 



1757 [-Medium velocity 1751 



1789) 



Without any bullet 



■ Medium velocity 1444. 



-Medium velocity 1413. 



Double proof Battle powder. 



Gov. pow. ] No unfired grs. through the sci . 



"} 



Medium velocity 1764. 



In the 1 first experiments the barrel was fixed to a carriage, that has not been 

 described, which, together with the barrel and rods by which it was suspended, 

 weighed only 234- lb. Length of the bore of the piece 43.5 inches. Weight 



