390 MR DEUCHAU'S ACCOUNT 
about 28 pounds, and the ropes and pullies, which might 
be 12 pounds more, making in all 205 pounds; thus giv- 
ing an improved power equal to 42 pounds. This load- 
stone is now in the possession of Dr Hope, Professor of 
Chemistry, in this city, and is the most powerful one of its 
size of which we have any recorded account. And it must 
be gratifying to know, that this valuable specimen is not to 
be lost to science, as it might have been, had it fallen into 
the possession of a private collector ; but that Dr Hope, 
with his usual liberality, means it to form an addition to 
the invaluable collection of minerals in the Museum of the 
Edinburgh University. 
The weight of the second loadstone, independent of its 
armature and connecting iron, is 28 J pounds; it mea- 
sures. 
In length, - - - - 5| inches, «^ 
— breadth, - - - - 4 
— height, - - - - 8 
On the 28th November 1818, I had suspended from it a 
mass of calcedony weighing 80 pounds, to which is to be 
added the weight of the connecting iron and ropes, which 
is 5| pounds. This loadstone is still in the possession of 
Mr Sanderson. 
The third of these minerals I have never seen, but I 
understand its size and power are intermediate between the 
two first. It is now the property of Gilbert Innes, Esq, 
of Stowe. 
These natural magnets came to this country in the same 
vessel ; and during their passage, the two first mentioned 
had been placed beside each other with their improper 
poles in contact, by means of which, the weaker one had 
its poles changed, the north being converted into a south, 
and the south into a north pole. 
