( ^27 ) 
any other Bar between the faid Pins, with its marked 
End clofe againft the great Pin, I placed the marked 
End of the faid biggefl Bar clofe againft the unmarked 
End of the other, and made four Holes on its Sides, 
and drove Pins in them as before, and fo continued 
^ do, until the Board was full : It held half a Dozen 
Bars.^ I took Care to place the marked End of every 
Bar diredled towards the great Iron Pin which was to 
keep’them from Hiding down to the Ground, when the 
other End of the Board was elevated, to ftand in the 
inagnetical Line. The Board ftanding with one End 
on the Ground, and the other leaning againft the Wall, 
at the South End of the Room, I took the armed' Bar, 
which had Vertue, and placed its North Pole’s Ar. 
mour about the Middle of the higheft Bar, whole 
Middle I could reach to (keeping the Armour of the 
South Pole a little upon one Side of the Bars, juft fo 
far as I might be fure not to touch them with that 
End) and then immediately drew it from thence down- 
ward to the Bottom of the loweft Bar : After the fame 
Manner placing the Armour of the South Pole on the 
hdiddle of the • loweft Bar (and holding the armed 
North Pole on one Side, that it might not touch) I 
drew it upward to the Top of the higheft Bar, whofe 
Top I could reach. And if the End of any Bar was a 
little under that which it relied againft, I ufed to put 
a lizeable Chip under it, that the Armour might not 
hitch in drawing it over the Places of their Contacts. 
I ufually touched the Bars on all four of their Sides, 
then took out the loweft, and (letting the reft gently 
Hide down to the Iron Pin) placed it at the Top, that 
thole which were firft at the Top might in their Turns 
take their Places in the Middle, and be well touched. 
Y y I coim- 
