( 4 1 1 ) 
Log-, one of which falls in the fame Proportion as 
the other rifes. The falling or pendent Pallet meet- 
ing a Refinance from the Water, as the Ship moves, 
lias, by that Means, a circular Motion under Water, 
which is latter or flower, according as the Veffel 
moves. This Motion is communicated to a Dial with- 
in the Ship (which is fix’d either in the Matter’s 
Cabbin, or any other proper Place) by means of a 
Rope (of any convenient Length) fatten’d to the 
Tail of the Y, and carried to the Dial. The Motion 
being thus communicated to this Dial, which has a 
Bell in it, it flrikes exadlly the geometrical Paces. 
Miles, or Leagues, which the Ship has run. Thus is’ 
the Ship’s Diftance attained; and with equal Eafe may 
the Forces of Tides and Currents be difcovered bv 
this Inftruinent. ' 
The Figures adjoin’d more fully explain the firft 
Movement of my Machine. 
In Figure 5. AKCL and BHD 1 are the Pallets, 
which are work’d from the Legs DE and CE into 
the Form they appear, to a Breadth of about 4 Inches 
and a half. The Length of the Pallets (B D and AC) 
are 8 Inches, The Branches or Legs, D E and C E, 
are each 15 Inches and a half long, and 2 in Circum- 
ference, the Diameter of which is about two Thirds 
of an Inch ; and the Angle C E D, which is contain- 
ed between them, is 45 Degrees. 
The Shank EF is of the fame Thicknefs or Cir- 
cumference with CE and DE, and is 27 Inches Ion* 
At the Point' F there is a Ring, where one End of 
the Rope FG is hook’d to the Machine, the other 
End G being fixed to the Dial within the Ship or 
Veffel. This Rope may be about 5 Fathoms, more or 
Jefs, according as the Dial is fixed high or low, in 
refped to the Surface of the Water. 
M m m 2 
In 
