Daily American telegraph., 1852-09-18
Protection from Lightning.

rTHE undersigned, being the duly appointed Agent Of
NNGRoD MANUrACroRr Covingon Kentucky begs to offer
those superior Rods of Annealed
combined in their manufactured thus rendering them equal
copper conductors They in teneet lengths with
accurately fitted brass connecting JOINTS entire
new style Of metallic patentcd atachfen for brick or
frame buildings; also, glass solaer OF novel and inge
mounted with sod platinum silver point pacnted
twelve inches long, surrounded at the base with three
lar negative magnets which possess the power to an extra
most fearful Thunderstorm and embrace the entire perfec
ton of science to the present tmo the whole constitu
ting the most magnificent and perfect silent conductor
presented to the public
Safety has not been compromised by aording these
cent rods at such low rates. the greatest attention has
been given their construction to be readily attached
The astonishing of the negative magnets in dcharg
strated by the Eiectrometer, when points
have shown but slight results though placed nnde. the
electricity from the atmosphere when you would scarcely
suspect any being present
These improvements being secured by double letters
tent hereby cautioned against laying yourselves
liable, by purchasing of those who not authorized
who substituting inferior limitations All agents duly
appointed can show their certificates Have good rods
none. CHARLES W. HEfDON,
Washington City.
do hereby certify that have app lied various powerful
chemical reagents to sprats Patent Points for Lightning
Rods and that the results these experiments convince
that they will resist the action of atmospheric causes and
thereby preserve the extremity SHARPE condition most
sena to protection against lightning The reagents used
In the above experiments were solution of chloride of So
dum common SALT acetic acid suphuric acid and hydro
chloric acid. With the first, there action the
metal with the several acids there very slga fact
sufficient to show that atmospheric influences would have
sensible effect.
JOHN LEcoNTE, Prof Of Nat. Phil. ct Chem.
UNIVERSITY OF Ga, October 8, 1850.
The Lightning Conductors Of Mr. Spratt offered TO me,
are well calculated to perform the Office for which they are
intended Yours truly, Prof. R0BT. PETER,
LEXINGTON, Ky, February TO- 1850.
CHICAGO, September 3, 1850.
This may certify that have examined, somewhat criti-
cally James spratts Patent Lightning Rods and that
Of opinion that IL Is constructed scientfc principles For
combining durability, cheapness, and efficacy deem il
equal and think SUPERIOR to any other rod offered
for my inspection. Prot. JAS. v. q. BLANEY.
AUGUSTA, (GA) November IL, 1850.
This will certify that have examined the Lightning
Rods Metallic Points, and Isoating Attachments
featured by Mr. Spra and regard them constructed in
conformity to the general laws of the electric fluid the
the result of several to which they we're submit
ted TO resist for years the action Of those atmospheric
most likely to corrode them. A. MEANS,
Prof Phys Sc, Emory College, Ca and Prof Chem.
Pharm., Medical College, Ga.
Tho 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,
the best have
to be hoped that the Of these Rods may become
general important auxiliary defence against danger
which must DO regarded of ordinary magnitude, to
which all buildings liable. r. SIJIMAN, Jr.,
Prof of Chem. in the University of Louisville.
LOUISVILLE, January q, 1851.
All orders left at ANDREW DUFFYS Stove Mandatory,
It'll street. will be promptly attended to- ut GEORGE
BELLS Alexandria, Va Of King and st. Asaph sts.
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