170 Testing the Value of Guns by Firing under Water. 



the powder packed with a paper wad, although Mr. Alford 

 stated to me that it was the impression of sportsmen that there 

 would be no difference. I decided therefore to test this point 

 by actual experiment. To prepare cartridges for the Spanish 

 model would have involved considerable extra expense; I 

 therefore concluded to substitute a Sharp's Rifle of .50 in. caliber. 

 The cartridges were composed as follows : 



TABLE NO. 8. 

 (SEE TABLES 1, 2. 3.) 



PABTS. 



I CABTRIDGES FOB 

 .50 CA1/IBEB. 



ii. cartridges (air) 



FOR .58 CALIBER. 



III. CARTRIDGES FOB 

 .58 CALIBEB. 





Grains. 



Grams. 



Grains 



Grams. 



Grains. 



Grams. 





648.03 



41.99 



669 94 



43 41 



695.43 



45 061 





70.22 

 450.18 

 126.55 



1.08 



4.55 

 29.17 

 8.20 



.07 



69 91 



449 75 

 147.23 



3 05 



4 53 

 29.142 

 9.54 



.198 



70 19 

 447.85 i 

 161.82 



13 811 

 1.76 f 



4.548 



" of bullet 



29.019 





10 485 



" of paraffine 



* 895 * 

 .114 j 



Total 



648 03 



41.99 



669 94 



43.41 



695 43 



45 061 







* Wad. 



The following tables contain the report of my experiments 

 conducted with the new cartridges, on May 4th. 

 Temperature of the water, 19° C, or 66.2 F. 



EXPERIMENTS WITH THE U. S. ARMY RIFLE. 



TABLE No. 9. 

 Height of water above the rifle, 11 >£ inches, in each case. 



* Quite a difference in effect will be noticed between the same cartridge in the second and 

 third columns of the table, owing to the powder being loose. 



