C Si6 ) 
directed preftntfy towards the North, and it likcwifc 
moved towards theoppofite Side, where the Water was 
below the Brim of the Glafi, and thus it would do as 
often as I fo placed ir. Then 1 underpropped theGIafs 
to make the Brims ftand Horizontal, and filled it with 
Water to the Top, and then I found that the littJeGlafs 
I put in, as before, did not move toward any fide ; by 
which I judged that the Surface of the Water was high- 
er than the Brims of the Drinking-Glafs, and fo the 
PrefTure oFthc Air was every where equal on the Sur- 
face of the Water. 
Next I fitted me another fmall Glafs witli a fmall bit 
of a Magnet in it, as Fig. 7. A B. C. D. E. F. G H. 
/. K. in the Cavity of which, as A, B. C. /. K. was 
placed the bit of Magnet £. the Neck C. D, was near 
Nine Inches long, and its Cavity about as big as a 
Horfe Hair : this had a Ball blown to make it fwim on 
the Surface of the Water, D. E, H, and the upper part 
of it, E. E G. did rife above the Water. This I did to 
try if the bit of Magnet would adt fo far under the Wa- 
ter to'turn Northward of it felf : and alfo to try whe- 
ther the Bit thus far under Water, would dip towards an 
Iron moved above the Surface of the Water : and I faw, 
that firft it would not reft till it had placed it felf North 
and South, and that the outmoft Part, G. pointed to- 
wzrdb the Eafl. By reafon of the Length of this Neck, 
I had no Gtafsdeep enough for it, and therefore I ufed 
a little Box, which I filled Brim full, that the little 
Glafs placed in the Water might not be moved to any 
Side. _ ' , 
Farther, I fitted another fmall Glafs, whofe Stem 
as C D. Fig. 7. was 13. Inches long, and the bit of 
Magnet was half as long again as 'twas thick, and I 
found the pofmoo of its Poles by a Compafs-Needle, be- 
fore I included it in the Glafs, that it was in the 
Middle 
