( ) 
together j but if the leiTer Fruftum h c d e (hould long 
remain feparated from the whole Stone, before the faid 
Cube was cut off, that the Polarity of the Cube would 
be more or lefs fixed, and conform itfelf more or lefs 
to the Direction of the Line e c. However, this 
is certain, that if the two Frufta are joined together, 
as they ftand direded Fig.'Ll ox Fig. 3 , with the 
North Pole of one to the South Pole of the other, 
they aflift one another in lifting Iron. If joined Fig. 
with the South Pole of one againfl the South Pole 
of the other, by repelling they reciprocally deftroy 
each other’s Vertue, and alfo hinder one another’s At- 
tradion at the North Poles, which are not joined. If 
they are placed together, as in Fig. $th, though they 
endeavour to avoid one another, yet they do not de- 
ftroy each other’s Vertue fo much as in the preceding 
Cafe, nor yet at all if there is a perfed Contad: 
For if this Pofture of two Magnets adually adhering 
would diminifh their Vertue, one Part of the fame 
Loadftone would deftroy another Part of itfelf, and in 
a very fhort Time there would be no fuch Thing as 
Magnetifm. In this Pofture they mutually help one 
another’s Attradion, becaufe their Polarities are di- 
reded the fame Way. If they are applied, as in Fig. 
6th, with their Sides together, and their Polarities 
contrarily direded, the North Pole of the one (at 
either End) attradingthe South Pole of the- other, and 
the South Pole the North,they fcarcely injure one ano- 
ther’s Vertue by fo lying together, but hinder each 
other from attrading other Things, by fpending their 
Vertue on each other. 
VIII. That all magnetical Attradion (as alfo Repul- 
fion) is mutual ; for Iron or Steel attrad the Load- 
' T t z ftone, 
