New Compass.—Newly-invented Muskets. 467 
NEW COMPASS. 
Mr. William Clark, a messenger in Chatham Dock-yard, has 
invented a mariner’s compass on an entirely new principle. 
The needle consists of four arms or poles, placed at right angles, 
and uniting in one common centre. The two northern poles are 
secured to the N.W. and N.E. and the two southern poles 
to the S.E. and S.W. points of the card, which places the 
four cardinal points right between the angles of the needle, 
and allows the card to point north and south as heretofore, the 
cards now in use answering the purpose. This compass has 
been tried under different circumstances, and, as far as can be 
ascertained by the experiments already made, is allowed to pos- 
sess the principles of polarity and stability beyond that of any 
compass now in use. 
NEWLY INVENTED MUSKETS. 
[From the New York Evening Post of April 10.} 
A curious invention in fire-arms has lately been accomplished 
by an ingenious mechanic of this place, by the name of Isaiah 
Jennings ; and in point of importance, both for public and private 
use, it is probably not equalled by any invention of the present age. 
It is a single barrel and lock, stocked in the usual manner, and 
is perfectly simple, safe, and convenient. The number of charges 
may be extended to fifteen or even twenty—each charge being 
under as complete controul as a single charge in an ordinary 
gun; and may be fired in the space of two seconds to a charge, 
or at longer intervals, at the option of the possessor, with the 
same accuracy and force as any other gun. The principle can be 
applied to any musket, rifle, fowling piece, or pistol, and can be 
made to fire from two to twelve times, without adding any thing 
to the incumbrance of the piece, except five or six ounces to its 
weight. Thus the soldier is put in possession of a gun, out of 
which he can throw twelve or fifteen charges at his enemy, at the 
commencement of an engagement, as fast as he can cock and 
pull trigger, and be left in possession of a simple gun, to load 
and fire single charges like any otier gun, with the advantage of 
its priming itself. The cavalry may be furnished with bolster 
pistols containing five or six charges, whichcan be used on horse- 
back, with the same convenience as ordinary pistols. The navy 
can be furnished with muskets for marines in close engagements, 
and boarding pistols, unequalled by any thing in naval warfare. 
In defending a breach, the power of ten men is concentrated in 
one; and in arming our small garrisons on the Indian frontiers, 
their power might be increased fourfold at an inconsiderable ex- 
pense. And as a defence against the pirates that now throng our 
neighbouring waters, two or three of these guns, on board a 
5N2 merchant 
