Daily American telegraph., 1852-08-21
Protection from Lightning.

1HE undersigned, being the duly appointed Agent Of
SNoRoD MANURAcToRY Covingon Kentucky, begs to offer
these superior Rods, of Spirawted Carbonized Anneaed
combined their manufacturer thus rendering them equal
copper conductors. They in enfeet lengths with
new style Of metallic patentea aachments for brick or
frame buildings ALSO glass solaters of novel and inge
N sos nsr
twelve inches long, surrounded at tho base with three
lar negative which the to an extra
most fearful Thunderstorm and embrace the entire perec
ton Of science up to the present time the whole eonstu
ting the most magnificent and perfect silent conductor
Safety has not been compromised by aordng these ex
ceent rods at such low rates the greatest attention has
been given to their to be readily attached
The astonishing Of the negative in discharg
ing the air of its opposite elements has been clearly demon
rated by the Electrometer when unmagnetized points
have shown but slight results though placed under the
conditions In fact they gather and silently discharge
electricity from the atmosphere when you would scarcely
suspect any being present
tent hereby cautioned against laying yourselves
liable, by purchasing of those who not auhorzedo
none. CHARLES w. HEYDON,
Washington City.
do hereby certify that have app lied various powerful
Rods and that the results Of these experiments convince
that they will resist the action of atmospheric causes and
thereby preserve the extremity harpa condition most
enta protection against lightning The reagents used
in the above experiments solution of chloride of
common acetlc
hloric acid With the first, there action the
metal with the several acid there very sg-a fact
sufficient to show that atmospheric influences would have
sensible effect.
JOHN LECoNTE. Prof of Nat Phil etChem
UNIVERSITY OF GA, October s, 1850.
The Lightning Conductors of Mr. spratt offered to me-
well calculated to perform the Office for which they
intended Yours truly, Prof R0BT. PETER.
LEXINGTON, XII, February 20, 1880
CHICAGO September 3, 1850.
This may certify that have examined somewhat crt
cally james Spratts Patent Lightning Rods
of opinion that II is constructed scientific principles
combining durability, cheapness and efficacy, deem 1t
equal, and think SUPERIOR to any oter rod offered
for my inspection. Prof JAS. v. 2. BLANEY.
AUGUSTA, (GA) November IL, 1850.
This will certify that have examined the Lightning
Rods, Metallic Points, and Isolatng Attachments, manu-
conformity to the general laws of the electric fluid the
metallic compound constituting the Points, promising,
from the result of several tests which they submit
ted resist for years the action Of those atmospheric
most likely to corrode them A. MEANS,
Prof Phys. &c., Emory College, Ga and Prof Chem. and
Pharm., Medical College, Ga
The Lightning Conductors put up by Mr. Henry NJ Smith,
Of this city, the plan Of Mr. Sprat appear to to be
very well devised and in point Of mechanical construction,
are the best have
Is to be hoped that the Of these Rods may become
general important auxiliary defence against danger
which must be regarded as OF ordinary magnitude TO
which all buildings are liable. X. SILIMAN, Jr.,
Prof Of Chem. in the University Of Louisville.
LOUISVILLE, January u, 1851
All orders left at ANDREW DUFFYs Stove Mandatory,
It'll street, will be promptly attended to; Mt GE0HGE
BELLS Alexandria, ya corner Of King and st. Asaph sts
ap1+H