( 3*5 ) 
central Magnet (by the Force of its.Attrai^lion thereof^- 
and Repulhon of the oppofite Pole) and there reft after 
a fmall Vibration or two. 
XXIX. That the Fly of a Compafs (beeaufe it is a 
perfecft Magnet, Prop, ix) if it turns eafy on its Pin, 
inufl neceftarily conform its Poles to the magnetical 
Meridian as the Loadftone does, and for the fame 
Reafon. 
XXX. Alfo beeaufe Steel regularly touched is a 
perfeft Magnet, the North Ends of the Flies of feveral 
CompalTes mull: all of them repel one another, and fo 
muft their South Ends : But the North End of one 
and the South End of any other, do' mutually attract 
each other, as isfaid of Loadftones, Prop. ^th. And * 
in North Latitude the North End of a Needle will 
confequently vibrate towards the Top of a tranfient Bar 
erefted, and the South End towards the Bottom. 
XXXI. Thar a Needle firft equally poifed, then 
touched and put to ofcillate on its Pivots in the magne- 
tical Meridian, will in North Latitude have its North 
End (i. e. its South Pole) deprell'ed until it direds to 
theNorth-attrading Point of the central Magnet ; where> 
after feveral Ofcillations, it will at laftreft: And in 
South Latitude the South End will be deprefted after 
the fame Manner. 
XXXII. That not only a touched horizontal Needle, 
which has permanent Polarity, will endeavour to con- 
form itfelf to the magnetical Meridian, but alfo one 
that has no other than tranfient Vertue,' and is with 
the greateft Care freed from fixed Magnetifm (if made 
and ufed as in the Pracogn.) will do fo too, though 
with this Difference, that which End foever happens 
to be placed neareft towards the magnetical North will 
faintly 
