CHOKE-BORES. 313 



Large shot, as a rule, diverge less than smaller ones 

 from choke-bores, measuring from outside to outside 

 of pattern, because their motion of rotation is more 

 certain, lasting, and uniform throughout the charge. 



Now let us try a few special experiments. If a shot 

 be fired from a choke-bore at a target, say 40 yards 

 distance, with a cartridge loaded with two different 

 sizes of shot, say sixes and nines, one occupying the 

 central portion or interior circles of the charge, and 

 the other the exterior or outer (which may be done by 

 inserting an open tube of tin or cardboard about f 

 inch in diameter in the centre of the shell before put- 

 ting in the shot, and afterward withdrawing it), those 

 shot which occupied the outer circles in the cartridge 

 will be found equally distributed over the centre of 

 the pattern with the others. 



Next, we will try a shot with a cartridge that 

 contains large shot on one side, and small on the 

 other, kept separate in loading by a cardboard parti- 

 tion, which is withdrawn before putting on the top 

 wad. The result will be similar'to the first, and both 

 sizes will appear on either side of the centre of the 

 target in nearly equal numbers. 



Again, we will load ; this time, two cartridges like 

 the last, but leaving the cardboard partitions in ; one 

 we will shoot at the 40 yards target, and for the 



