374 Miftettanea Guriofa. 



when thofe happen in the Ocean j and likewife 

 whereas both the Waters of the Sea and the Air 

 of our Earth, are Fluids fubject, in a great 

 Meafure, to the fame Laws of Motion ; it is 

 plain, that the Rule of our great Philofopher 

 takes place here, vhfr That Natural Effe&s of the 

 fame kjnd are owing to the fame Caufes. 6a) 



What difference that known Property of the 

 Air, which is not in Water, makes in the Cafe, 

 1 fhall mew anon j letting afide the Considerati- 

 on of that for the prefent ; It is certain, That as 

 the Sea is, fo muft our Air, twice every x$ 

 Hours, be rais'd upwards to a considerable height, 

 by the Attraction of the Moon coming to the 

 Meridian ; fo that inftead of a Spherical, it 

 muft form it (elf into a Spheroidal, or Oval Fi- 

 gure, whofe Iongeft Diameter being produced, 

 would pais thro' the Moon. That the like Rai- 

 fing muft follow as often as the Sun is in the Me- 

 ridian of any Place, either above or below the 

 Horizon. Moreover, That this Elevation is 

 greatefl upon the New and Full Moons, becaufe 

 both Sun and Moon do then confpire in their 

 Attraction \ leafl on the Quarters, in that they 

 then drawing different ways, 'tis only the Diffe- 

 rence of their Actions produces the Effect. Laft- 

 ly, That this Intumefcence will be of a middle 

 degree, at the time between the Quarters, and 

 New and Full Moon. 



From the fame Principles, The Motion up- 

 wards of the Air will be ftrongeft of all about 

 the Equinoxes; the Equinoctial Line being over 

 that Circle of the Globe, which has the greateft 

 Diameter, either of the Luminaries when in that 



are 



00 Newton, Frincip. p. 402, 



