Electrical Phenomena. 435 
Governors having now appointed Mr, Adams to be oculist 
to the Hospital, (where all the blind men in the navy are 
sent when invalid), that gentleman has pertormed a series 
of novel operations for cataract, upon a large number of 
patients with singular success. We have not been informed 
of the peculiarities in Mr. Adams’s newest operations, nor 
have accurate intelligence of the results of those compared 
with the old, methods; but those results we have learned are 
decidedly in favour of the former. 
Among the curiosities of our day is the application of a 
conductor to convey to the deaf-born the enjoyment of 
musical sounds, which doubtless gives them exquisite de- 
light: but Dr. Robertson, jate from Dublin, and known by 
the rescue of Romana, hopes that speech may one day find 
its passage through the same or similar channel. 
A character for the use of the blind, palpable on both 
sides of the paper, is another invention, which makes part 
of Dr. R’s system of education for the blind, ‘the deaf, 
and the dumb, which he intends to announce in this me- 
tropolis. 
ELECTRICAL PH. NOMENA. 
Dear Sin, — THE experiments mentioned in my _ last 
paper* were made about two years ago, and have since been 
often repeated with uniform results, and consequently, they 
appeared to me as unquestionable facts, though they con- 
tradicted the experiments of Professor Robison, and the 
opinions of some other writers on electricity. 
In your last number a paper from Mr. Singer appears, in 
which he asserts that I have fallen into error in my experi- 
ments, but he has not adduced one fact to prove it. There 
is, however, one truth in his paper, and that truth renders 
all the rest of his arguments nugatory. 
Mr. Singer says, ‘if, after bringing an electrified body 
near an insulated conductor, on withdrawing it the insu- 
Jated conductor remains permanently electrified, it must 
have lost or received electricity.” This is very true. And 
it is equally true, that an electrified body being brought 
near one end of an insulated conductor, electricity lies off 
into the air from the other end, and therefore, when the 
electrified body is removed, the conductor will remain per- 
manently electrified. This is a physical trath which ren~ 
ders all opinions and suppositions that may be advancee 
against it trifling and of 20 consequence. 
I am, dear sit, yours. respectfully, 
Lynn, Noy. 18, 1813. Ez, WALKER. 
* Phil, Mag. vol. xlii. p. 216, 
he Mr. 
