C 441 ) 
In a Trial with a Lead, whofe Nail was fetawry (like that of 
the Fig 5.) the Ball returned 1034. After which Trial, the depth 
was found to be juft 14 fathom* 
T he laft Lead and Ball being let down without a Line, the Ball 
returned at 35. 
In another Trial with a Lead that never failed, the Ball returned 
in 34, and the Lead toucht the bottom at 17. 
By a Trial with another Lead, the fame time was found ex- 
a&ly. 
By a third T rial with this laft, the very fame. 
Thefe Trials were made near about High-water, at the depth of 
14 fathom juft by meafure : And in them, the motions feem to be 
5 foot every fecond. 
In all thefe Trials ,, the greateft difficulty was , in the ufe of Co- 
nical Figures , with Iron Crooks 9 to bend the Iron, that it might 
be fure to carry down the Ball with it to the bottom , and when 
come thither y to let it go : for almoft every one of thefe Leads 
failed in one of thefe requifites , till by feveral Trials they had been 
adjufted. 
It is not to be omitted , That the laft Trials being made near 
High- water, the Ball was found to rife (by the Boat , being per- 
mitted to drive) far off upon one fide , out of the way, that any 
light thing, fuffered to fwirn on the water, would be carried • which 
feemed to argue a motion of the under parts of the water / differ- 
ing from that of the upper ( a thing which is faid to. be at certain 
times of theTydes , both at the mouth of th eSound-, and of the 
S freights 5 which delerves to be further inquired into.) The An- 
gle made by thefe different motions, feemed to be about 40 De- 
grees, 
Mm in z 
6, To 
