, in the Military Art, are those whose barrels, instead of being smooth on the inside, are formed with a number of spiral channels, making each about a turn and a half in the length of the barrel. These carry their balls both farther and truer than the common pieces. For the nature and qualities of them, see Robins's Tracts, vol. 1 pa. 328 &c.
· 
· 
ABCDEFGHKLMNOPQRSTWXYZABCEGLMN
Entry taken from A Mathematical and Philosophical Dictionary, by Charles Hutton, 1796.
This text has been generated using commercial OCR software, and there are still many problems; it is slowly getting better over time. Please don't reuse the content (e.g. do not post to wikipedia) without asking liam at holoweb dot net first (mention the colour of your socks in the mail), because I am still working on fixing errors. Thanks!