ADDITIONS ann CORRECTIONS 
To the preceding Paper. 
Page 14. after line 8. add, If one part of antimony and six of bismuth, 
both in powder, be mixed together and inclosed in a glass tube, they 
exhibit the same phenomena as the alloy. 
P. 17. lines 5, 6. for positive, negative; read negative, positive. 
Addition to Note * same page. If gold, silver, copper, brass or zinc wires 
be heated in connection with iron, the deviation which is at first 
positive, becomes negative at a red heat. If the experiment be 
made by dipping wires not previously connected, in boiling mer- 
cury, the deviation at the instant of contact, depends, in some cases, 
upon the order in which they are immersed. This effect is pro- 
duced by copper with gold, silver, zinc, brass and plumbago, but 
not with platina, tin or iron; by zinc with gold, silver, brass, iron 
and plumbago, but not with platina or tin; and by brass with gold, 
silver, and tin, but not with platina or iron. 
Note + same page, for below, above ; read above, below. 
Table VIII. dele the vertical and horizontal columns marked silver, and 
in the columns for gold read silver. 
In the horizontal column for rhodium, znseré tin and _ brass negative, 
and copper positive. 
Table IX. add galena above bismuth; after manganese dele silver ; 
insert brass between lead and rhodium; for brass read gold, and 
for gold read silver. 
P. 31. line 5. for deviates read revolves. 
line 8. after exhibits read another arrangement for producing. 
