Mijcellanea Curio/a. ai 



noctial : And therefore the nearer the Mcon ap- 

 proaches the Poles, the lefs is the agitation of the 

 Ocean, which is of all the greatelr, when the 

 Moon is in the /Equinoctial, or firtheft: diitant 

 from the Poles. Whence the Sun and Moon, 

 being either conjoined or oppofire in the Equi- 

 noctial, produce the greater!: Spring Tides j and 

 the fubfequent Neap Tide?, being produced by 

 the Tropical Moon in the Quarters, are always 

 the lead Tides , whereas in June and December^ 

 the Spring Tides are made by the Tropical Sun 

 and Moon, and therefore lefs vigorous ; and the 

 Neap Tides by the Aquino ctial Moon, which 

 therefore are the ilronger : Hence it happens, 

 that the difference between the Spring and Neap 

 Tides in thefe Months, is much lefs confiderable 

 than in March and September. And the reafon 

 why the very higheft Spring Tides are found to 

 be rather before the Vernal and after the Autum- 

 nal Equinox,. vj\. in February and OBober* than 

 precilely upon them, is, becaufe the Sun is near- 

 er the Earth in the Winter Months, and fo comes 

 to have a greater effe£t in producing the Tides. 



Hitherto we have coniider'd fuch Affections 

 of the Tides as are Universal, without relation to 

 particular Cafes ; what follows from the differing 

 Latitudes of places, will be eaflly underitood by 

 the following Fig. ( Vide Fig. i. Plate I ,) 



Let Ap EP be the Earth cover'd over with 

 very deep Waters, C its Center, P,/>, irs Poles, 

 A E the ^Equinoctial, F, /, the parallel of La- 

 titude of a Place, D, d, aaotherParallel at equal 

 diitance on the other fide of the JEqmno&ia^ 

 H, b 9 the two Points where the Moon is verti- 

 cal, and let ^ be the great Circle, wherein 

 the Moon appears Horizontal. It is evident, 

 that a Spheroid defcrib'd upon III, and Kk% 



C 3 {hall 



