Rrft, Thai Englifh-m^VL and fueh other as are well verfed in 
the Englifb tongue, find mo difficulty in underftanding the defi 
criptions of thefe ^/igmi, nor in apprehending their ftrudtnre^ 
exhibited by the Figures^ efpecially if notice be taken of theE- 
aiendation,expreffed at the end of Num. lo. about the mifgta- 
ving the Bended end of the Springing ^/r^^(which it feeras has act 
been noted 'mfranc€j though the MdNum.iOA% known to have 
been fecn there a preity while before their Jmrnal of ^Vi^y 24. 
was pubHfli'c. ) And as for the particular of the Bmk^t, fetching 
water from the bottom of the Sea, both the Figure and the d.'^^- 
nc%Qd De/criptionihcrcof are fo plain and clear, that 'tis fome 
wonder here, that any difficulty of underllanding them is pre- 
tended by any^ that hath bat ordinary skillvaCutCs and the Eng"^ 
/i/&language. Mean while, that way^ which the French Autho? 
recommends for this purpofe as. morcfimplc^ Fidel. aBra/i- 
Pump with double Valves 5 is not at all unknown in England^ nor 
has bin left untried diereibut was found inconvenieo^^in refpedi' 
that the Valves in defcending.did not fully open^ and give Ae 
water a free paffage through the Cavity of the Veffel ^ nor in 
afcending fhut foclofe, as to hinder the water from coming iu 
at the top : Whereas by the way, propofed in Nfm both is 
perform'd with great eafe and Security. 
Secondly^ Whereas the Fr^;sf^/J Author is of opinion, that 'tis 
unknown, How much time a Heavy Body requires to fink m 
warer,according to a certain depth; He may pleafe to take no- 
tice 3 that that hath been made out in England by frequent Ex- 
periments ; by which, fevera! Depths, found by this Method of 
founding without a Line, were examined. by trying them oi^er a- 
gain in the fame place with a Line,, after the common way . And as 
to that §mn of hi3,Whet!ier a heavy Body defcendsin the fame^ 
pr^)/^^?ri^f^7z offwiftnefs in Water^ that, it woukldo in Air } The 
anfwe:r is, that it docs not j but that, after it is funk one or twO ' 
fathoms into the Water, it has there arrived to its greitcft fwifc 
nefsj and keeps^ after that, an equal degree of velocity /thei^f- 
0anct o^ the water being then found equal to the Endeavour oi 
the heavy Body downwards 
Tbirdly^WhQn the fame Authdr alledges that it muft be known^, 
when a Dght Body reafcendt^ from the bottom of the water to^ 
shs-' 
