I chaiig'd it, at which I wondered how Co fmafl a piece 
of the Loadftone fliould turn to the North, though it 
were under the Water. The Third Glafe, as Fig, 6. 
would Hand with its part T. (bmetimes North and fome. 
times ?/eftward, &c, which made me think that either 
this little bit wanted its Polarity or that its Axis flood 
upright, in which cafes it would oot euro. Theo I 
took the Glafs, and feveral ways eodea\^oured to change 
the Pofture of the Bit of Stone, then trying it, I found 
it would turn as the ether. Then I try'd by putting a 
Key into the Water pretty near the Glafs, to fee if it 
would be moved, but it would not : But taking a long 
Iron and fo ufing it, it turned a little ^ and fo did alio 
the Glafs, Fig. 4. 
Theft Turnings of the Loadftone were fo weak as 
not to counterpoife the Thoufandch Part of a Grain. 
Farther I have oblerved, that any fluid Liquor, as Wine, 
Beer, Water, ^c. ftunding in a Glafs, does ri(e higher 
againft the Sides than in the Middle of the Glafs: This 
I take to be cau fed by the Preffure of the Air, for the 
narrower the Glafi is, the higher it will ft and. And 1 
have found it rife in a fmall Pipe^ Two Inches above the 
Water without the Pipe : Nay, I have made one Pipe 
fo fmall, that the Liquor rofe above Seven Inches in the 
Pipe, Now the former Phsenomena of the moving of 
I the fmall Glalles towards the Sides are to be afcribed to 
the fame Caufe, that is, to the Preflure of the Air 
which prelled the more againft the Middle, the wider 
1 the VelTel was that contained the Water, and fo m^de 
it rile higher by the Sides. For I took a common Beer- 
Glafs, that being (et on a Table, the upper Brim of it 
; inclined a little, fo that, fill'd with water, it ran over 
i the dipping Side, but was lower than the oppofite Brim. 
i In this Glafs I put one of my Glafles with a bit of Mag- 
net in it, and put it next the Side that overflo^ved, it 
G g g g X direded 
