$gi Da fothergill’s Account of 
his apartments in the Britifh Mufeum. One of thefe parts 
was fixed up in your Mufeum, the other was left at the 
lodgings of one of your very ufeful, ingenious members, 
j. h. de Magellan, for the purpofe of fome experiments, 
and alfo for impregnating ftrongly the needles of fea- 
compafles. Here it was accidentally deftroyed by fire, 
and the parts it confifted of rendered almoft wholly ufe- 
lefs. A new one has, however, been made, and impreg- 
nated w T ith the magnetical power, by the ingenious gen- 
tleman abovemention ed, according to the method of Dr. 
knight. It has acquired a confiderable degree of mag- 
netic force, by being placed in the polar line with the 
other part of this machine that was unhurt, and where 
in time it will, perhaps, acquire a confiderable degree of 
magnetic energy. 
I with it had been in my power to have given a minute 
and pertinent detail of my deceased friend's difeoveries 
in this branch of knowledge. He acquainted me, it is 
true, at different times in converfation, of the progrefs he 
had made in thefe difeoveries; but, as I then thought he 
intended to leave behind him an exaCt account of his 
experiments and refearches and their relult, I rather 
liffened to his relations as matters of inftruCtive amufe- 
ment, not thinking it would ever be necelfary for any 
other perfon than himfelf to. give the public an account 
6f his labours. Indeed, there are many ufeful memorials 
of his, on this fubjeCt, in your own collections, to which 
I muff refer the inquifitive reader. I fhall only mention 
fome 
