Part IV. OfThings relating io Mathematic}^ y &c. 365 
fmall bended pieces, fet or pricked in crofs-ways, inffead 
of Ribs: and fo ty’dall together with Fin-Whale-Bone. , 
This Wooden-Work is cover'd all over, both below and 
above, with Seal-Skins , fewed together with Leathern- 
Thongs. Saving, that towards the middle, is an Oval Hole, 
encompalfed with a Rim about four inches high, big 
enough for a man to lit down in. 
In length, feventeen feet. From'the Centre of the faid Hole 
or Seat, forward,'Ten feet 5 from thence,backward,feven. In 
breadth at the Seat, a foot and i In depth, backward, feven 
inches and 1; forward, a foot ; becaufe of the mans feet. 
And the Boat feems thereby to be carried forward with the 
more eafe: as a Coach, in being hung higher behind. The 
whole Boat is anfwerable to a great Bladder, in which, 
though the Waves daih and beat over it never fo much, the 
man Hill fits fafe. 
He makes ufe but of one Dare, about nine feet long. 
Made of AJh, and ihaped fomewhat anfwerable to a flrong 
Bow. In the middle, an inch and I thick, and an inch and 
* broad, by the Horizontal meafure: towards both ends, 
about 4 of an inch thick, and two inches and I broad, by 
the Vertical. At each end is fallen d a Facile, here wanting. 
This Oare he holds in the middle, and Rowing with both 
ends alternately, makes it ferve inllead of two. 
War. A GUN affixed to an Iron Triangle; the middle 
of the Gun, to one of the Angles 5 and the Breech, to the 
middle of the fubtended fide: and fo to be fallen d to a Floor 
or Heady Frame, either at all the three Corners, or only at 
one of the hinder. Contriv’d by my Lord Vicount 
Brouncher , for the making of Experiments of the RE- 
COY TIN G of Guns. Delineated in the Hiftory of the 
Royal Society, (a) Together with the Experiments made (•) Part aj 
herewith by his Lordlhip 5 firft before the End Society , p- 233 ‘ 
and afterwards before the King: fet down in a Table of 
five Columns. The Firll Ihewing the Corner Hoped from 
Recoyling; the Second, the different Charges of Powder; 
the Third, the Dillances to which the Bullet was carry’d 
wide of the mark; the Fourth, the fide on which it was 
carry’d; the Laff, the diffance of the Mark from the Muz¬ 
zle of the Gun. As alfo, the Caufes afligned by his Lordlhip, 
for the particulars moll obfervable. 
