( ) 
half Way through the Thicknefs thereof, and wrought 
the Hole with a Drill (pointed like the Punch) that it 
might be truly round, and cleanfed off the Afperity 
which the Punch and Drill had raifed round the Hole, 
left it (hould injure the Top of the Pin when it was 
placing thereon. Then I bended it in this Form, 
_—/TN 
taking Care to bend it the right Way, that the Hole 
might he on the under Side. Then I marked one End, 
by flatting it a little with a Hammer, that it might 
be known from the other. Then placing it on a (harp 
Pin ,to find which End was heaviefl, I made both alike • 
in Weight, and deprived it of all fixed Magnetifm. 
Then I brought it again to as true a Poife as I could, 
by rubbing the heaviefi: End on a Whetftone, and 
not a File, which might give it Magnetifm again. I' 
fitted a Pin for it of brafs Wire, full fo fmall as the 
middle Strings of a Spinnet, making the Point very 
meagre and round as well as fharp, and obferved it 
frequently with a Lens of two Inches Focus ; and if it 
appeared fiat, I mended it on a Hone, and took great 
Care in putting on the Needle, not to hurt the tender 
Point of the Pin. I put a Glafs over it, to keep off all 
manner of fanning by the Air, the lead Degree where* 
of did fpoil the Experiments. 
VIII. A fecond Needle, which I thought better 
than the former, I made thus : In the middle of fuch 
a Piece of Wire as the former was made ofj I wrought 
a Hole through it as perpendicular as I could to its 
Axis, or Length, and fo fmall as any of thofe which are 
drilled through the Pillars of a Watch, if not fmall- 
S s ^ cr. 
