788 



The Shot- Gun. 



gun to the distant target. Two guns were used in these experi- 

 ments, one of 12 the other of 10 gauge. They were "full choke- 

 bored," and were choked exactly alike. They were made by the 

 Colt Arms Manufacturing Co., of Hartford, Ct. 



The following tables give the results of our experiments : 



I. 10 Colt gun, 5 drs. Curtis & Harvey 

 powder, i^ oz. shot. 



Size of Shot. Vel. jo yds. Vel. 40 yds. Vel. 50 yds. 

 No. 1 buck .1153 • • 1067 

 1147 . . 1132 

 1126 



FF . 

 BB . 



No. 3 

 No. 6 

 No. 8 

 No. 10 



1 146 

 1066 

 1012 



995 



908 



1015 



9 6 3 



880 

 803 



928 



859 

 775 

 716 



III. 12 Colt gun, 31^ drs. Curtis & Har- 

 vey powder, i yi oz. of shot. 



Size of Shot. Vel. 30 yds. Vel. 40 yds. 



No 



FF . 



BB . 



No. 3 



No. 6 



No. 8 



No. 10 



1 buck 



862 

 844 

 825 

 816 

 796 



795 

 754 

 739 



749 

 680 



Vel. jo yds. 



667 

 696 

 600 

 607 

 610 



IV. 12 Colt gun, 4 drs. Curtis & Harvey 

 powder, ij{ oz. of shot. 



No. 8 

 No. 10 



847 



748 



722 

 657 



671 

 59 6 



Each measure of velocity given in these tables is the mean value 

 obtained from several experiments, varying in number from three to 

 six. The headings, "velocity 30, 40, and 50 yards," mean that the 

 numbers under them give the average velocities of the flight of shot 

 over these distances, and not the velocities at 30, 40, and 50 yards 

 from the «nn. 



It will be observed that the shot used were Nos. 10, 8, 6, 3, BB, 

 FF, and No. 1 buckshot. They were so selected because a pellet 

 of any number in the above series weighs very nearly double the 

 preceding one. Thus, a pellet of No. 8 weighs double one of No. 

 10, a pellet of No. 6 weighs double one of No. 8, and so on. 

 These relations of weight among the pellets were obtained so that 

 I could readily reach the relations existing between the velocity 

 of gunshot and the weight of the pellet. The shot used was 

 kindly furnished me by Tatham & Bros., of New York, who used 

 carefully gauged sieves in their manufacture. The powder used was 



