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6, I fuppofe the Drill having a S. Pole given it by 
the Magnet, could not be heat To far upward toward the 
Box by drilling, as it had received Polarity : So that fup- 
pofing the very top to be fufficiently heat, and to have loft 
its South Polarity, it has it ftillfupplied from the parts 
upwards Magnerick Virtue, as lalwaysobferved, tend- 
ing ftill toward the Excreao^s: (as appears from the 
Edges of the Arms of a Loadftone, which the Virtue 
feeming from the Surface of every fide there to unite, 
takes up much more Filings of Iron than the middle 
can.) 
7. As to the Conclufions, Firjl^ That a Drill is natu- 
rally a North Pole, I fuppole may be true, but it is con- 
trary diredly to what is affirmed in the 6fth Paragraph, 
1^/2, That the Drill made by Mr. Hunt^ was indifferent 
tp either Pole, And I fiippofc that bare drilling 
might be able to give a Polarity to a Drill, if it could be 
made indifferent, as well as filing does, if the Drill be 
aftd fo briskly as to be made as hot as the File makes the 
Iron. Secondly, That though a S. Pole given by the 
Magrlet cannot be taken off by the Heat of a brisk Mo- 
tion (as that of drilling) ; which yet by the Experiment 
of my Knife feems to be contradicted,- yet perhaps the 
Heat may be great enough to produce a Polarity in an 
indifferent piece of Iron ; as was before faid to be done, 
in little indifferent Drill-like pieces of Steel, by filing. 
r have lately try'd feveral fmall Experiments referring 
to what I before have faid ; but with fuch Uncertainty, 
that as I find many things in my Tryals contrary to 
what others have feem'd to find ; fo I queftion whether 
any thing I have faid will univerfally bear theTefl. So 
that happening to be hindred ("as I am like to be) more 
than ufoally, with other Concerns, I am forc'd at pre- 
ftnt to want that Satisfaction I promifed my felf, till my 
felf hereafter ta^\ endeavour, or fome more able,. 
in 
