[ 3 
Trop . 2 1 
The 'immediate Caufe y why two or more magnetical 
Bodies attract each other y is the Flux of one and 
the fame Stream of magnetical Matter through 
them. . 
■Exp. : Vl. 
•It appeared in the third Experiment, that when 
the South Pole of one Magnet was oppofed to the 
North of another, a Stream of magnetic Matter 
was carried from one to the other, and did not re- 
turn back to the Pole where it firft entered, till after 
having pafled through both Bars : and it is needlefs 
to obferve that two Bars in this Pofition are in a 
State of Attraction. The fifth Experiment fhewed* 
that when the two South or North Poles were op- 
pofed, there was no Stream common to both. 
Now it is well known, that magnetical Bodies in 
this Situation are fo far from attracting, thaf they 
flrongly repel each other. If the third Experiment 
be repeated, with the Magnets placed at different 
Diftances from each other, we ihall find that more 
of the magnetical Matter will pafs from one polar 
Surface to the other, in proportion as the Diftance 
betwixt is lefs. The Attraction is therefore greater 
as the Diftances dimimifh. And at Diftances where 
none of the magnetic Stream pafles from one Mag* 
net to the other, there is no Sign of Attraction. 
So that this Caufe is not only coexiftent with the 
EffeCt, but alfo proportionable thereto, 
