( 49 ) 
aforefaid Invention) the Juftice to own, that he dif- 
fented from me in this Particular, in regard he faid the 
Forks muft have different Pofitions. according to the 
Velocity of the Veffel to which they were fixed, and 
, confequently could not have an equal Number of Re- 
volutions m fwift and flow Motion. 
Whilfl I was confidering where to carry on' my 
Experiments to Prove the Verity of my l/ftrumen^ 
and to anfwer this Objeftion, I had the Honour 
mux, Efq; whofe Memory will always remain de« 
r * encourage all lau- 
lated for Publick Good, he foon became my Patron ; 
?be a"/-' i'^"" T Commiffioners 
of the Admiralty, and my Machine fell within his 
Tf an Experiment 
hfm River Accordingly I Ihew’d to 
him, and feveral of the principal Officers and Com- 
miffion^ers of his Majefty’s Navy, the Nature and 
Ole of It between London and ffooPwich, when he 
feemed to be of the fame Opinion with Dr Defa- 
guhers, Whether in a certain Diftance and ^n 
different Motions of the Veffel, the Inftrument could 
revolve equally Hereupon he advifed me to take a 
Trip over to /f./W, and to try Machine with 
the Tmrh" ^roughly to examine 
Ae long Canals in 
Currem”"^*^^’ or no Tide or 
rFiz/f ombark on Boardthe 
Wtlham and Mary Yacht, which was ordered to 
carry over the Lady of Count fVelderen, one of the 
^ then 
