Ms tneannlie Counter pavfe will rife and fall (lower i and confequently by 
lefs proportions, than the weight it felf, the firft Pulley may have upon it a 
Wheeleor two, to turn J^^^at^j at any proportion required, fo as to. give th^ 
minute parts of the motion, and degrees ofrifings and fallings. AH which 
!S to be obfervcd by PenMum'^dtches^ that have Minmes and Seconds, with 
Ciiff ^/^according to Mr. Mugenis way. 
And becaufe if the Hole, by which the water is let into the Pump, be af 
large as the Bore ofthe Pump it feif, the weight that is raifed by the water, 
will rife and fall with an Undulalation , according to the inequality of the 
Sea's Surface, 'twill therefore be fit, that the Hole, by which the water en- 
ters, be lefs than half as bigg as the Bore of the Pump ^ any inconvenience 
tliat may follow thereupon, as to the Periods and Stations of the Floud and 
Ebb, not being confiderablc. - 
And to the end, that it may appear the better, what are the partkuUr Ob- 
fervations, defired to be made, near Brifiol or Chiap-fiow bridg , it was 
thought not amifs, to fee them down diftindly by themfelves. 
1. The degreesof the Rifing and Falling of the water every quarter of an 
hour (or as often as conveniently may be) from the Periods the Tides and 
Ebbs ; to be obferved night and day, for 2 or 3 months. 
2. The degrees of the velocity of the Motion of the Water every quarter 
of an hour for fome whole Tides together ; to be obferved by a fecond 
'Pendfil'Wmh '^ 2ini a logg faftcned to a line of fome 50 fathoms, wound 
about a wheel. 
. 3* The exafi: meafurcsof the Heighti of every utmoft High- water and 
Low- water, from one Spring«tide to another, for fome Months or rather 
Years. 
4» The exaft Heights of Spring- tides and Spring-Ebbs for fotne Years to- 
gether. 
5. ThePofition of the Wind at every obfcrvation of the Tides j and the 
times of its Changes and the degrees of its Strength. 
6. The State of the Weather, as to Rain, Hail, Mift, Hazincfs,&c, and 
the times of its Changes* 
7. At the times of obfervation of the Tides, the height of the Thermo- 
meter ; the height of the Baroffope ; the height of the Hj^rofcope-, the Age 
of the Moon, anibet Jzimmhs and her place in all refpeds And laftly 
the Suris place • all thefe to minntesi> 
And it would be convenient, to keep ^otirnalTdles^ for all thefe Obfer- 
vations, each anfwering to its day of the Month. 
For the Apparatus of all thefe obferyations, there will be particularly ne- 
ceflary. 
A good Fendfilum-wsLtch. 
A Fane fliewing Azimuths to minute parts. 
An Infirument tomcafurethe ftrengthof theWinde, 
hh^g(Z2,vdgQgineedh(htmngAK>mHths todegrjees. 
