270 On Electrical Phenoména ; aid 
washed it: the former of these opinions is the most probable: 
The nitrite of lead equally precipitates the nitrate of copper. 
29. The solution of subnitrite forms with the muriate of gold 
a vellow flaky precipitate. If when the precipitate is nearly all 
collected we filter the liquor, it deposits metallic gold. I should 
almost be inclined to think this preaipitata was a double muriate 
containing abundance of base. 
[Vo be continued. ] 
V. On Electrical Phenomena; and on the new Substance 
called Iode. By Mr. J: Murray. 
Saffron Walden, Essex, April 12, 1814. 
Sirs, —Some errata blend with my paper which you did me the 
honour to insert in your last number. As the import. suffers 
in some measure from this inadvertency, I must solicit the fa- 
vour of your making the necessary corrections subjoined. 
As there appears some obscurity in that passage which com- 
mences “I observe,’ &c. (page 177,) I request that it may stand 
as follows ; viz. I observe not heat sufficient to affect our most 
delicate thermometers. Thus, have I suffered metallic lamine 
to be fused by the electric dischan ge on the back of the hand, 
and ether &ec. inflamed. 
For “* two powers”? read “two powders ; 
line say ‘* rosin or sulphur.” 
In the second line succeeding, read ‘or the ball.” In page 
176, for “ the paper as usual perforated’’ &c. read “the paper 
was as usual perforated, and a circular portion of the China ink 
displaced from the balls, while an indent’’ &c. 
In the same page, dele should before ‘‘ be framed anew” 
therein, (with a spark taken through it, by means of a person 
uninsulated,) and surely &c. 
I must not be understood as armed with hostility against the 
honoured names opposed to the theory I advocate— 
” 
and in the samé 
, ® . . . y . 
“«« Amicus Socrates, amicus Plato, sed magis amica Veritas.” 
If I am wrong, [shall not he ashamed to own my error, nor, 
I trust, be found wanting in my acknowledgements for that in- 
formation which may set me right. It is by the collision of 
minds that truth is elicited; and this consideration should smooth 
those asperities which too often mingle with the sentiments of 
the best of men. A reciprocity or mutual interchange of opi- 
nion is not too much to hope for. 
In reverting to the experiment made with the dlackened balls, 
I desire 
