( Zlj^A ) 
Dr Gilbert (whofe Judgment and Fidelity is not to 
be queftioned ) is as exprefs as his Friend Mr Barlow. For 
(L. 2. C. 5. ) (peaking of a Magnet divided, and (h^ mng 
how that the parts which in the whole Stone coalefced, do 
by Separation repel one another, he faith. That what was 
the N. and S» Pole before^ is fuch Jiill. Non enim ffaich he J 
tmmtitatur Vertickas (quod ^^a!e ajjirmat B. Porta,) l^h-mlicrt 
[^Poli fcparati'^ non convcn'mnt^ nt alter ad aUzni^^ h^rU- 
nant ^ tamen uicrquc in idem horlzontk pin<l^j7i couvc}-- 
tuntur, 
How the Truth lieth between Dr Ridley and thz tvva 
later Authors I cannot determine, having never fo cut d 
.Magnet. But by the Miignetick Laws, as well as from the 
Authority of Dr Gilbert ana Mr Barloiv, I doubt not but 
the later is the trueft opinion. 
• But in Cleft Wires the cafe is very uncouth. OMenrhnes 
the Poles are quite changed : So thai: what was the N'jrth, 
becometh the Pole oi the Wire in all refpeftS '^ I 
mean, not only turning, but alfo embracing, or avoidiiig 
the Poles of the Loadftone, as if it hid received a new, 
and contrary Touch. Sometimes one half of the Wire will 
retain its Magnefifm, which it had before fphtring, and 
the other half have it quite changed. Sometimes no chaiige 
at all will enfue, only the Magnetifm be much weakened 3 
as indeed it always is in all the Experiments where the Wii'e 
is fplit* (But generally, where one of the halves hach fuf- 
fered change, the other not, I have obferved, That 'tis 
che thinneft and weakeft that hath been changed, and the 
thickeft hath retained its Touch. ) Sometimes where one 
of the Split Halves receiveth an inverted Ferticity, or fcem- 
eth to have no Verticity at all^ one of its Ends will incline 
to one of the Poles of the Magnet, not according to its 
Touch, but in aa inverted order, and the ocher end be at- 
traded indifferently by both the Poles of the Loadftone. 
And in forne cafes, that End fhall be attraded by one Pole, 
Ddddddddddddd but 
