(2^8) 
Water. Hiafl, or other underftanding Perfon , who dwells by the Watcr- 
fide» 
Ic would alfo deferve ( thinks he ) to be inquired into , whether , when 
the Tides be higheft, the Ebbs be ever lowed, & contra (which is gene- 
' rally affirmed , and almoft put out of qaeftion ) or rather ( which futcs 
beft with his Hypothefis ) whether, when the Tides are higheft, both in the 
Annual and Menftrual Periods, the Low waters be not alfo higheft • and at 
Ncap-Tidcf, the Ebbes alfo very low. 
He adds, that he (hould expeft , that the Spring Tides now coming , and 
thofe at the beginning o( September , fhould n©t be fo high , at thofe at the 
middle oi St; temher ^ and then lower again at the beginning of October, and 
after that, higher at tht middle October, and higher yet about ih^ beginning 
of November (at the ufual times of Sf ring-tides after the New and Fnll.) 
Conjiderations and Enquiries concerning Tides ^ by Sir Robert 
Moray 5 Hkewife for a further fearch into Dr, Wallis's nerpljf 
/«W//&> Hypothefis. 
In regard that the High and tow waters are obferved to increafc, 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 
Weftcrn parts of Enrope^ the Tides are at the highej^, ^nd about the ^^rter^ 
Moons ^zti\it lo^tfi^ ( the former called Spring'tides, the other Neaf -tides ; ) 
and that according to the height and excefles of the Tides ^ih^ Ebbes in oppo- 
fition are atifwerable to them, the heigheft Tide having the loweft Ebbe, and 
the loweft Ebbe, the higheft Tide the Tides from the £lnarttr to the kighe/i 
Spring-tide increafing in a certain proportion; and from the 4$'/r/;irf-/iW<? to 
'hc,^4rr^r-jiWtf dccreafinginlikc proportion, as is fupppfed .* And alfo the 
Ebbes riHng and falling conftantly after the fame manner : It is wifhed, that 
it may be inquired, in what proportion thefe Increafes and Decrcafes , Ri- 
fings and Fallings happen to be in regard of one another ? 
And *tis fuppofed , upon fome Gbfervations^, made in fit places , by the 
above-mentioned Gentleman, though , (ashimfelf acknowledges) nos tho- 
roughly and exadly performed, that the Increafe of the Tides is made in the 
Propirtion of Sines the firft Increafe exceeding the loweft in a fiaall propor- 
tion; the next in a greater-, the third greater than that; and fooato the 
iDid-raoft>whereof theexcefsis greateft,diminifhingagainfromthat) to the 
higheft Spring.Tide ; fo as the proportions, befote and after the Middle, do 
greatly anfwer one another,or feem to de fo. And likewife, from the highefi 
Spring'tide^to the ItiWeJI- Neap'tide,thc Deereafeifetm to keep the like pro- 
portions; the EbbiJ ri(ing and falling in like manner and in like propor- 
tions. All which is fuppoied to fall out, when ro Vf ini or other Accident 
caufcs aq alteration. 
And 
