1847." 



Memoranda on Explosive Cotton. 



183 



Dum Dum. 

 Ordnance Experiments with Gun Cotton. 



■-a 



"Si 



>> 



Gun used. 



"So"3 

 •£PQ 



6 

 f 



s 



.2 



OS 



> 



Ball 

 thrown 

 yards. 



Remarks. 



* 





Ounces 













19th 



3d 



4 



8 inch Mor- 

 tar. 



68 

 lbs. 





45° 



250 



Mortar somewhat foul. 



» 



1st 



2 



33 



33 





33 



331 



Perfectly clean. 



it 



a 



4 



»t 



}J 





ii 



839 



Quite clean. Recoil 2 inches. 



a 



a 



6 



a 



33 





ii 



1030 



Do. Time 14 seconds. Re- 

 coil Si inches. 



a 



a 



8 



» 



" 





a 



1186 



Do. Time 15| seconds, re- 

 coil 10 inches. 



a 



a 



10 



t> 



« 





" 



1295 



The same as last- — Perfect- 

 ly cool. 



it 



a 



12 



33 



33 





33 



1366 



The same time, 1 65 seconds. 

 Recoil 13 inches. 



a 



a 



4 



33 . 



45 





„ 



706 



1 



a 



a 

 33 



a 

 it 



8 

 4 



8 



it 



6 pr. brass. 

 6 pr. do. 



33 





33 



3° 

 6° 



1424 



745 



1550 



1 Guns clean, and cool ; 

 recoil trifling. 



it 



it 



12 



9 pr. do. 







6° 



1672 



1 



J 



25th 





4 



8 inch mor. 



45 



ii 



45° 



j 

 717 









4 



a 



33 





33 



724 





The ranges above exhibited are as nearly as possible four times as 

 great as those given in the Woolwich tables of mortar practice in 1838, 

 strength of powder from 21 to 22 T 'oths. With this powder an 8 inch 

 mortar with 46 pound shot gave with 15£ ounces a range of 700 yards 

 which was in all the above trials exceeded by 4 ounces of cotton. 



In two trials made of some cotton prepared by Mr. Siddons, corres- 

 ponding ranges were obtained with the 8 inch mortar and 6 pr. field gun. 



Lastly a sample of cotton sent to me for trial by Mr. Scott of the H. 

 Co.'s Dispensary tested by the mandril eprouvette gan gave a range of 

 1 10| feet against 111 of my first quality. 



These experiments with cotton made with the utmost care by three 

 different persons, show an extraordinary uniformity in the quality and 



* Present on the 19th January— Lieut.-Col. Lawrenson, C. B., Capts. White- 

 ford, Broome, Douglas, and other officers of the Artillery Regiment. 



