The Shot- Gun. 



789 



Curtis & Harvey's Diamond Grain No. 6. The powder and shot in each 

 cartridge fired had been carefully weighed out in an accurate balance. 

 A glance at the tables at once shows the rapid increase in the 

 velocity of gunshot from No. 10 up to No. 3. With the heavier 

 pellets the increase in velocity is less marked. Thus the table 



IPIO 



970 

 950 



930 



B90 

 670 



8*0 



830 



headed " 10 Colt gun, 4 drs. Curtis & Harvey, 1 % oz. shot " shows 

 that No. 8 shot has 72 feet per second velocity over No. 10 shot, 

 and No. 6 has 46 feet over No. 8, while No. 3 has only 23 feet over 

 No. 6, and BB shot gains only 1 1 feet over No. 3. 



The relations between velocity and weight of pellet shown in 

 this table may be taken as a type of all the experiments, and I 

 have graphically shown their relations in the accompanying curve. 



The divisions on the scale, measured from the bottom line up- 

 ward, give the velocity per second of the pellets. One unit on this 

 scale equals 20 feet of flight of a pellet, and a unit of the scale, 

 measured from right to left on the diagram, equals one unit of weight 

 of pellet. The weight of a pellet of No. 10 shot is here taken as the 

 unit of weight. The numbers of the shot are written under the hori- 

 zontal line ; the velocities on the vertical line. When the curve inter- 

 sects these lines, we find the velocity given on the vertical scale 

 corresponding to the number or weight of shot given on the hori- 

 zontal line of the diagram. 



So far as the experiments with these two special guns show, 

 there is no doubt a great superiority in the 10 over the 12 gauge 

 gun, when each is loaded with the same weight of powder and shot. 

 50A 



