Daily American telegraph. [volume] (Washington [D.C.]) 1851-1852, 1852-05-31
Protection from Lightning.

NHE undersigned, being the duly appointed Agent OF
SPRATrs ELECTRICIAN ELECTRO MErAILURoIsT LIGHT
MING ROD MANUFAcToRY Covingon Kentucky begs TO offer
these superior Rods Spratwsted carbonzed Annealed
on with Zinc Protectors, and Eectropoitve elements
combined manufacture; thus rendering them equal
copper conductors They are in teneet lengths with
accurately brasssorew connecting joints, entire
style metallic patented) attachments, for brick
frame buildings also glass solaers, Of novel nge
mounted with solid platinum silver point (patented0
twelve long surrounded at the base with three
ordinary extent dsehargng the opposite elements of the
fearful Thunderstorm and embrace the entire perec
ton of science up TO the present me the whole consttu
ting magnificent perfect silent conductor ever
presented to the public
Safety has not been compromised by aording these ex
ceent rods at such low rates the greatest attention
been given to their construction be readily attached
The astonishing power Of the negative magnets In dschar
strated by the Electromecr, when unmagnezed points
have shown but slight results though placed under the
conditions In fact they gather and silently discharge
electricity rom the atmosphere when you would scarcely
suspect any being present
tent you hereby cautioned against laying yourselves
liable by purchasing Of those who are not authorized or
appointed show their certificates Have good rods
none. CHARLES w. HEYDON,
Washington City.
hereby certify that have app lied various powerful
chemical reagents Spras Patent Points for Lightning
Rods and that the results Of these experiments convince
that they will resist the action of atmospheric causes and
the extremity Tpe most e
in the above experiments were solution OF chloride OF so
dunn, salt) acetic acid suphur1c acd and hydro
chloric acid With the first, there was no action the
metal with the several acids there very stgha fact
sufficient show that atmospheric influences would have
no 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-
well calculated to perform the Office for which they
intended Yours truly, Prof ROBT. PETER.
LEXINGTON, KY, February 20, 1850
CHICAGO September 3, 1850.
This may certify that have examined, somewhat criti
cay James Spratts Patent Lightning Rods and that
of opinion that IL is constructed scientific principles For
combining durability, cheapness, and efficacy deem it
equal and think SUPERIOR to any other rod offered
for my inspection. Prof JAS. " z. BLANEY.
AUGUSTA, (GA) November II, 1850.
This will certify that have examined the Lightning
Rods Metallic Points and Isolatng Attachments,
featured by Mr. Spra and regard them constructed in
conformity to the general laws of the oectud and the
metallic compound constituting the Points, promising
from the result OF several tests to which they submit
ted to resist for years the action of those causes
most likely to corrode them A. MEANS,
Prof Phys Sc, 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
1t to be hoped that the Of these Rods may become
general important auxiliary defence against danger
which must be regarded of ordinary magnitude to
which all buildings liable R.SILIMAN, Jr.,
Prof of Chem in the University of Louisville
LOUISVILLE January q, 1851.
All orders left at ANDREW DUFFYS Stove Mandatory,
7h street, will be promptly attended to- at GEORGE
BELLS, Alexandria, Va Of King and ST. Asaph sts
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