Daily American telegraph., 1852-05-04
Protection from Lightning.

V'HE undersigned being the duly appointed Agent of
sPRATT's ELECTRICIAN AND ELECTRO LIGHT
NINdRoD MASuFAoToRr Coyngton, Kentucky bes to offer
these superior Rods of Spratwited Carbonized Anneaed
lron with Zinc Protectors aud Eecropostiye elements
combined IN their manufacturer thus rendering them equal
to copper as conductors. They IN teneet lengths with
brass connecting joints, entire
new style OF metallic atented) Attachments for briclor
frame buildings ALSO glass isoaters, of novel and inge
Nous construction, atented0 forming lock; the whole
mounted with solid platinum silver point, (patented
twelve inches ona surrounded ut the base with three
lar negative magnets which possess the power extra
ordinary extent of dchargng the opposite elements OF the
most fearful Thunderstorm and embrace the entire periec
ton of science up to the present time the whole consu
ting the most magnificent and perfect silent conductor
presented to the public.
Safety has not been compromised by aordng these ex
ceent rods at such low rates. the greatest attention has
been given to their construction to be readily attached
The astonishing of the negative magnets In dscharg
ing the air Of its opposite elements has been clearly demon
straed by the Elecrometer when unmagnetized points
have shown but slight results though placed under the
conditions In fact they gather silently discharge
suspect any being present.
These improvements being secured by double letters
table, by purchasing of those who authorized or
who substituting inferior limitations All agents duly
appointed can show their certificates Have good rods or
none. CHARLES w. HEfDO
Washington City.
do hereby certify that app lied various powerful
chemical reagents to Spra Patent Points for Lightning
Rods and that the results of these experiments convince
that they will resist the action of atmospheric causes and
thereby preserve the extremity sharpa condition most
senta to protection against lightning The reagents used
IN the ABOVE OF
dium, Common sa acec acid suphuric acid, and hydro
choric acid. With the first, there action on the
METAL with the several acids there very siga fact
sufficient to show that atmospheric influences would have
sensible effect n. 81. -. n..
JOHN LECoNTE. Prof of Nat. Phil. ct Chem.
UNIVERSITY OF Ga. October g. 1850.
The Lightning Conductors of Mr. Spratt offered to me,
well calculated to perform the Office for which they
intended. Yours, truly, Prof ROBT. PETER.
LEXINGTON, KY, February 20, 1850.
.,,.. IS .t..iyN0 CHICAGO, September 3, 1850.
This may certify that have examined somewhat cliti-
cally James Spratts Patent Lightning Rods, and that
combining durability, cheapness and efficacy, deem it
equal and think superior, to any other rod offered
for my inspection. Prof JAS " 2. BLANEY.
AUGUSTA, (GA.) November IL, 1850.
This will certify that have examined the Lightning
Rods Metallic Points, and Isolang Attachments,
factured by Mr. Spra and regard them constructed in
conformity to the laws of the electric fluid and the
from the result of several tests to which they submit
ted resist for 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, s,-- ~
The Lightning Conductors put up by Mr. Henry NJ Smith,
of this city, the plan of Mr. Sprat appear to to he
very well devised and in point of mechanical construction
are the best have
1t is to be hoped that the Of these Rods may become
which must be regarded of ordinary magnitude to
which all buildings liable. II. SILIMAN, Jr,
Prof of Chem. in the University of Louisville.
LOUISVILLE, January q, 1851.
All orders left at ANDREW DUFFYS Stove Mandatory,
7th street. will be promptly attended to; at GEORGE
BELLS Alexandria, Va Of King and St Asaph sts
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