Loadftone, yet It produced the fame Effeft. I provi. 
ded me a fmall Com pafs- Needle, and had it toucht by 
a Compafs-Maker, this I inclos'd in a feal'd Glafs that 
it might fwim and I found this would alfo turn to the 
Nonh and South: But I found that any little Bubbles 
on the Water would difturb the Working of the Nee- 
dle. 
Finding the Length and Weight of the Tubes were 
fome inapcdiment to the free Turning,! Broke the Glafs 
ftiorter, and fo blew it. 
Fig. 5-. G H. L K. L. M, 0. reprefent this Glafs, 
and P. the Loadftone : I bent the end of the Glafs, LM. 
that thereby the Situation of the Needle might be 
known in its Turning. I put this into a high Beer 
Glafs of Water, that it might fink to K. fo foon as the 
Glafs was in the Water, the Part M, turned to the'Nor th 
Eafl ; and though I turn'd it often, it would return to 
that Pofuioo and though I placed it in the middle of 
the Glafs, it would in a (hort time moveto one Side or 
other, and the nearer it approached the fafter it went 
toward the Side, as if there were fome Inclination of the 
Glafles to each other. ^ 
I had alfo federal final! bit5 of t;he faid Loadftone, one 
that was but il^i part of a Pound, and. one a little big- 
ger. I took Three of thefe bits and fitted GlafTes to 
them fuch as Q^R. S. t. Fig. 6. reprefenting the 
bit of Loadftone: That of Q^R. I only made that it 
mighc fwim upright without leaning to any Side: Two 
of thefe Glafles were fo blown, as that only S. T. rife 
above the Surface of the Water, and the Third did Flote 
a little more. One of the Glafles put in the Water 
drew the end t, Weflward, and did (b as often as I 
chang'd its Pofture, for the part would turn again 
and ftand Weftward. The Second Glafs turn'd its end 
7! toward the Eaft, and would turn fo again as often^ 
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