done by i> ) but much more in Hol!am\, whereby reafon of 
thofe lauiidationsj many Villages and Towns were ovcrflow'd. 
And though I cannot fo particularly name other years,yet I can 
very fafely fay, that I very often obferved Tides ftrangely high 
about thofe times of the year. 
This Obfervarion did for divers years caufe me much to 
wonder, not only becaufe it is fo contrary to the received opi- 
nion of the two jEquinoxes ; but becaufe 1 could not think of 
any thing fignal at thofe times of the ycaf i as being neither the 
two jEquimxet, nor the two Soljlices, nor the Sun's A^ogttum and 
Perigaum : {or U^nhs Apbe Hum znd Per ihelium norindeed,ac 
contrary times of the year, which at leaft, would feem to be ex- 
pelled. From Alhollandtide to Candlemafs being but three 
months ; and from thence to Alhollandtide again nine months. 
. At length it came into my mind, about four years fince^ that 
I -though there do not about thefe times happen any fingle fignal 
Accident, which might caft it on thefe times, yet there is a r^/;;^- 
pQund of two that may do it : Which is the Inequality of the 
turaldaj ( I mean that of 24^ hours,from noon to noon) arifiiig 
at leafl: from a double caufe ^ either of which fingly would caft 
it upon other times, but both joyntly on thofe. 
It's cominonly thought, how unequal focver the length be 
«bf the jffti/icial daycs as contradiftinguiflied to nights,yet that 
^he Natural D^y y reckoning from . lOon to noon, are all equal i 
But Ajlronomerj know welljthat even thefe dayes are unequal, 
¥oT,i\m Natural Dzy \% mtz,(\xveA not onely by one intire con- 
verfionof the j£quimUial^ ov jEquinoBial\\omSi (which is 
indeed taken to be performed in equal times,) but increa(es by 
' fomuch, asanfwers to that part of iht Sun i {or Earths, )d\mu2\ 
' motion as is performed in that time. For, when that part of the 
MquinoUial, which (with the Sun) was at the Mmdian yefterday 
at noon,is come thither again to day, it is not yet ISIocn (becaufe 
the Sun is not now at the place where yefterday he was, but is 
gone forward about one dcgrec,raore or lefs) but we muft ftay 
till that place, where the ^a?^ now iSj comes to the M^r/<^/^^Ti be- 
fore it be now Noon. 
Now this Additament(above the '?4y£y/i?WS/^/hours,0r intire 
converfionof they£r5'a/>joS/W) is upon a double account tme- 
quali 
