Testing the Value of Guns oy Firing under Water. 167 



wide, and 1 in. thick ; and was securely nailed upright in the 

 tank, by means of braces, so as to afford perfect resistance to the 

 bullet. The temperature of the water was 4° C, sp. gr. 1.000. 



The rifle was placed on the supports in the tank, was loaded 

 under water, and fired by inserting the hand and pulling the 

 trigger. In the first few experiments the trigger was pulled 

 by a string at a respectful distance. 



EXPERIMENTS WITH RIFLE No. I. 



(77. S. Model Rifle) 

 TABLE No. 4. 















AT 



A DISTANCE OF 







SHOTS. 











1 



2 



feet inches. 



The board was penetrated 



8% inches. 



2 



2 



6 



" " " " 



" •'• 



3 



3 







" " " '■' 



" " 



4 



3 



6 



" " " " 



" " 



5 



3 



9 



" " " " 



" " 



6 



3 



" 10K " 



" " " 



<> 



7 



8 



" 11 



" " " " 



" " 



8 



3 



" HM " 



" " " •' 



12^ " 



9 



3 



'■ 11J4 " 



it << i< << 



" 



10 



3 



" UK " 



" " " " 



.. « 



11 



3 



" UK " 



The bullet was imbedded 



•' " 



12 



3 



" 11% " 



" " •' " 



« <t 



13 



4 







X inch indentation 



" " 



14 



4 







" " " 



" " 



15 



4 



8 



y 8 " 



« .< 



16 



i 



" 8K " 





'' " 



17 



4 



" iok " 



1-32 " 



" " 



18 



4 



" UK " 



Indented 



" " 



19 



4 



" 11% " 



No mark 



" " 



20 



5 









" " 



EXPERIMENTS WITH RIFLE No. II. 



(77. S. Army Rifle). 

 TABLE No 5. 



NO OF 







HEIGHT OF WATEE 



SHOTS. 



AT A DISTA:^ OE OF 



BEMAEKS. 



OVEB BIFLE. 



1 



3 feet 3 inches 



The board was penetrated 



5>2 inches. 



2 



3 " 5 



t. .. .. i. 



<< •. 



3 



3 " 6 



■• '• •• « 



7 



4 



3 " 9 



" " ■« " 



6 



5 



3 ■' 10 



« .< .< .< 



<< .< 



6 



3 " 10K " 



" " " " 



12% 



7 



3 " 10 !£ 



" " " " 



12% 



8 



3 " 10% 



i< '< << <. 



12^ 



9 



3 " 10% " 



• i « << ,< 





10 



3 " 11 



Bullet imbedded 



.< .< 



11 



3 " il 



>• <• 



6 



12 



4 " 



« i t 



5% 



13 



4 " 



" " 





