( 54 ) 
« Hypothefes ; for Experiments of this Machine, 
« wherein may be had fome Millions of its Revo- 
« lutions, will perfedly (hew the Ufe that may be 
made thereof* In the Interim I believe, that Mr. Z>^ 
“ Saumarez^^s, Invention may be, nay, ought to be, 
« efpecially with this, laft Improvement, infinitely 
‘‘ preferred to all other Methods for afcertaining 
“ the Way of a Ship in the Sea^ 6cc. 
Here then you have the Opinion of a learned Gen- 
tleman of ray Improvement on this Invention, whofe 
Eminence among the Literati is fuch, that this alone 
might give a Sandion thereto. It is here obferved, 
that the Difference in tlie Revolutions of my Ma- 
chine, on this new Method, was fcarcely 4 in 331: 
Who then can fay this Difference was not owing to 
the different Sheers in our Boat on the Canal > But I 
(hall not go about to determine this, it remains for 
me now only to fhew the Improvement which I 
made of the Marine Surveyor whilft in Holland^ 
which is hinted, at in the Letter above, and which 
is now brought to fuch Perfedion^ that I perfuade 
my felf no very material Objedions can be brought 
againft it. The following Figure (hews this Improve- 
ment, wherein the Objedions of the different Incli- 
nations of the Fork are now entirely removed. See 
Fig- 4* 
A F G H is the Fork, in the fame Form as the 
Iron Fork defcribed in; the PMlofophical L^ranfi 
aBionSy Vol. xxxiii, for the Months^of November 
diViA December which differs from the other 
only, in the Materials of which it is framed ^ this be- 
ing contrived of fuch as to make it equiponderous 
with the Water, and to lie in an Horizontal Po- 
' fition, 
