Water- man ^ or Other undemanding Perfon , who dwells by the Water- 
lide» 
It would alfo deferve ( thinks he ) to be inquired into , whether , when 
ihe Tides be higheft, the Ebbs be ever loweft:, & contra •, (which is gene- 
rally affirmed , and almoft put out ofqueftion) or rather (which futes 
beft with his Hypothecs ) whether, when the- Tides are higheft, both in the 
Annual and Menftrual periods, the Low waters be not alfo higheft • and at 
Neap-Tide3, the Ebbes alfo very low. 
He adds, that he fliould expeift, that the Spring-Tides now coming, and 
thofe at the beginning of September , fbould n@t be fo high , as thole at the 
middle of September ; and then lower again at the beginning of October, and 
after that, higher at the middle of October , and higher yet about the beginning 
of November (at the ufual times of Spring-tides after the New and Full,) ** 
Conf derations and Enquiries concerning Tides , by Sir Robert 
Moray $ Ukgwife for a further fearch into Dr, Wallis’s newly 
fublijh't Hypothefis. 
In regard that the High and Low waters are obferved to increafe , and 
decreafe regularly at feveral feafons, according to the Moons age, fo as, 
about the New and Full Moon , or within two or three daies after , in the 
Weftern parts of Europe , the Tides are at the highefl , and about the Quarter- 
Meons, at th eloVvefi, ( the former call'd Spring-tides, the other Neap-tides ; ) 
and that according to the height and exceifes of the T idesyhe Ebbes in oppo- 
sition are anfwerable to them, the heigheft Tide having the loweft Ebbe, and 
the loweft Ebbe, the higheft Tide ; the Tides from the Quarter to the hightfb 
Spring-tide increaling in a certain proportion; and from the Spring- tide to 
the garter- tide decrealing in like proportion, as is fuppofed : And alfo the 
Ebbes riling and falling conftantly after the fame manner : It is wiftied, that 
it may be inquired , in what proportion thefe Inereafes and Decreafes , Ri- 
fings and Fallings happen to be in regard of one another ? 
And *tis fuppofed , upon fome Obfervations , made in fit places , by the 
above-mentioned Gentleman, though , ( as himfelf acknowledges) nos tho- 
roughly and exaftly performed, that the Increafe of the Tides is made in the 
Proportion of Sines • the fir ft Increafe exceeding the loweft in a final! propor- 
tion; the next in a greater •, the third greater than that; and foon to the 
mid-moft, whereof theexcefsis greateft,dimini(hing again from that, to the 
higheft Spring-Tide ; fo as the proportions, before and after the Middle , do 
greatly anfWer one another, or feem to de fo. And likewife, from the highefl 
Spring-tide , to the lotyefl Neap-tide, the Decreafes feem to keep the like pro- 
portions* the Ebbes riling and falling in like manner and in like propor- 
tions. All which is fuppofed to fall out, when no Wind or other Accident 
saufes an alteration,. 
