Thefe were my Obfervations about the fmall bits of 
the Magnet that they had but little extent of their 
Operation. Concering which, divers Learn'd Men 
havetry'd and written much; but whether their iryals 
were of this nature I know not. I defign'd alfb to 
try wirh a Glafs as Fig. 7. whofe ftem was Three 
Foot long, though by the aforefaid Tryals, I w z$ fatisfi'd 
the efFeft would have been the fame; for that the our- 
working of the bit would be the fame, and therefore I 
fpar'd the Labour. 
I cannot omit mentioning, that for fome Months laft 
pad, a certain German was in the City of Roterdam^ 
indeavour'd to make himfelf kno^ n for his Ability in 
Curing Sick and Wounded People by his Sympathetick 
Powder ; wJiich Operations he pretends to perform, at 
his Houfc, upon the Utine of thofe Perfons which is 
brought to him. 
A certain Perfon having a grevious pain in hisLegg, 
and having heard of this Germans pretending to Cure 
by his Sympathy Powder. Endeavour'd by a Letter to 
hira to bring him to me, that I might have fight of fo 
wonderful a Cure. This I confented to. 
After a full account cf the Cure of the Paid Perfon 
was given me in the prefence of the faid High German ; 
I ask'd, whether they would give me the freedom to 
Ipeak my thoughts concerning it.-* For that I being. a 
Hollander was not ufed to flatte'. To this they a- 
greed. 
I ask'd the German^ then among other things, What 
was become of Pus or Matter of the Sore, that 
they r^id was in the Sore Legg, and that fome of it 
was voided during the Operation of the Sympathetick 
Powder, and yet none remain'd in the Legg? He An- 
fwei'd. It was carried off hy the Vrine, Tiien I in- 
