do if, as to bring it to perfe&ion, I cannot determine. And there- 
fore, if as to my (elf any thing fhoul dbumanitus acciders ; yet 
poffibly the notion may prove worth the preferving to be pro- 
fecuted by others, if I do it not. And therefore Khali, atleaft 
toyourfelf, give fome general account of my prefent imper- 
fect and undigefted thoughts; 
I confider therefore, that in the Tides, or the Flux and Re- 
flux of the Sea,befides extraordinary Extravagancies, or Irregu- 
larities, whence great Inundations orftrangly high Tides do 
follow, ( which yet perhaps may prove not to be fo meerly ac- 
cidental as they have been thought to be, but might from the 
regular Laws of Motion,if well conftdered , be both well ac- 
counted for, and even foretold ; ) There are thefe three noto- 
rious Obfervations made of the Reciprocation of Tides. Fir/?, 
the Diurnal Reciprocation ; whereby twice in foraewhat more 
than 24. hours, we have aFIoud and an Ibbe j ora High-wa- 
ter and Low- water. Secondly , the Menflr&ah whereby in one 
Synodical period of the Moon,fuppofe from Full-moon to Full- 
moon, the Time of thofe Diurnal Vioffitudes doth move round 
through the whole compafs of the n or Natural day of 
twenty four hours : As for inftance,if at the Full-moon the full 
Sea be at fuch or fuch a place juft at^Noon , it (hall be the next 
day ( at the fame place ) fomewhat before One of the clock 5 
the day following, between One and Two ; and fo onward, till 
at the New-moon it fhall be at midnight 5. ( the other Tide, 
which in the Full-moon was at midnight, now at the New-moon 
coming to be at noons ) And fo forwardtillatthe nextFull- 
moon, the Full-fea lhall f at the fame place) come to be 
at Noon again : x Again, That of the Spring-tides and Neap- 
tides (as they are called j ) about the Full-moon and New- 
moon the Tides are at the Higheft , at the Quadratures the 
Tides are at the Loweft * And at the times intermediate , pro- 
portionably. Thirdly, the Annual ; whereby it is obferved,that 
at fometimes of the year, the Spring-tides are yet much higher' 
than the Spring-tides at other times of the year : Which Times 
are ufually taken to be at the Spring andAutumnc; or the two 
JEquinoxes > but I have reafon to believe ( as well from my 
own Obfervations, for many years, as of others who have been 
much 
