fo hammering it South upwards, I never Mkd produ- 
cing fixt South Poles in proper Rods. 
9. Old Drills and Punches are fixe North Poles, be*, 
caufe almoft conftanily uftd downwards, but new Drills 
are either Mutable PoleSjOr weak North Poles; when im 
a new Drill,! don't mean one made on the fpor, for that 
is probably a North Pole, becaufe quencht downwards 
in Water; but then foch Polarity made by bare Ignitioa 
is a weak Pole, and foon decays, and turns to a Mutable 
Pole : But I mean a Drill, which though never or little 
ufed, yet has been made fome Days or Weeks; Drili 
whh this Southward Horizontally, and 'cis a chance if 
you produce a fixt South Pole, but much lefs if you 
Drill South downwards,but if you Drill South upwards, 
you may make it a fixt South Pole. 
10. The ftronger the Polarity is, the longer it will 
laft ; a weak fixt Pole maJT degenerate into a Mutable 
Pole in a days time ; yea, I have known it in a few 
Minutes, while expofed to the Air^ and held in a pofi- 
tion contrary to its Pole ; On the contrary we find 
Needles toucht with good Loadftones hold that Vertue 
a great while, if kept from Air, and in a Meridian 
file. 
11. The Loadftone it (eif will not make a fixt Pole 
of any Iron, only it muft have a proper length if 'tis 
thick ; or if 'cis ftiort, it mud have a fufficient thinnefs : 
vSo, ordinary or weak Loadftones cannot fix a Pole in a 
thick fiiort Key,which yet they wil! do in a little Key. So 
in a (liOrt thick Iron tapering, a Loadftone may fix a Pole 
in the little end, when it cannot in the great end. 
II. When Ignition, Hammering, or a Loadftone 
cannot make fixt Poles, it muft not be thought that it 
can do abfolutely nothing on fuch Rods, for even then 
it may be found that there's an EfTeft of Magnetifm in 
them difcemable enough oiherways, though r>ot enough 
to make fixt Poles. 
R r 13. When 
