Daily American telegraph., 1852-07-07
Protection from Lightning.

I'HE undersigned, being the duly appointed Agent OF
SPRATrs ELECTRICIAN ELECTRO MErAILuRGIsf iAohf-
MAEUPAcToRY, Coyingon Kentucky begs 70 oier
these superior Rods fsprawsted carbonzed Annealed
IRON with Zinc Protectors, and Electropouye elements
combined in their manufacturer thus rendering them equal
copper as conductors They in tenee lengths wth
brassscrew connecting joints entire
new style o. metallic atented attachments for brick or
frame pongs also, glass solaers, OF novel and inge-
mounted with solid platinum silver point (patented)
twelve inches long, at the base with three angu
ordinary extent dchargg opposite elements of the
most fearful Thunderstorm and embrace the perc
ting the most magnificent and perfect silent conneor ever
SAFETY has not been compromised by aordng these az
ceen rods such low rates the greatest attention has
been given their construction as TO be readily
The astonishing power Of the negative magnets in dschar
ng the air its opposite elements has been clearly
stated by the Electrometer, when unmagnetzed 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. . ttl
tent you hereby cautioned against laying yourselves
liable by purchasing Of those who not authorized or
appointed show their certificates Have good rods or
none f CHARLES w. HEYD0N,
Washington City.
do hereby certify that have app lied various powerful
chemical reagents to spas Patent Points for Lightning
that they will resist the action of atmospheric causes and
thereby preserve the extremity condition most es
senal to protection against lightning The reagents used
in the above experiments solution Of chloride
dunn common salt acetic acid sulphurc acid and hydro
chloric acid. With the first there action the
metal; with the several acids there very sga fact
sufficient to show that atmospheric influences would have
q. JOHN LECoNTE, Prof of Nat. Phil. ct Chem.
UNIVERSITY OF Ga. October 8, 1860
The Lightning Conductors of Mr.. spratt offered to me-
are well calculated to perform the ONCE qs R Which thsS are
LEXINGTON, KY, February 90, 1850.
CHICAGO, September 8, 1860.
This may certify that have examined somewhat cri
cally James Spra1s Patent Lightning Rods, and that
opinion that constructed scientific principles For
combining durability, cheapness and efficacy, deem 1t
equal and think SUPERIOR to other rod ever offered
for my inspection. Prof JAS. Y. 2. BLANEY.
AUGUSTA, (GA.) November II, 1850.
This will certify that have examined the Lightning
Rods Metallic Points, and Isolang Attachments, manu-
factured by Mr. Spra and regard them as constructed in
conformity general laws of the electric id and the
metallic compound constituting the Points as promising
the result of several which they submit
ted to resist for years the action of those
most likely to corrode them A. MEANS,
Prof Phys. &c.. Emory College Gay and Prof Chem. and
Pharm, Medical College, Ga.
The Lightning Conductors put up by Mr. Henry Smith,
Of this city, the plan Of Mr. Sprat appear to to be
very well DEVISED point Of mechanical construction
are the best have
1t Is to be hoped that the of these Rods become
general important auxiliary defence against danger
which must be regarded Of ordinary magnitude to
which all buildings are liable. r. SILIMAN, Jr,
Prof Of Chem. in the University of Louisville.
LOUISVILLE, January 27, 1851
All orders left at ANDREW DUFFYS Stove Mandatory,
7th street. will be promptly attended to; at GEORGE
BELDS Alexandria, Va of King and St. Asaph sts
14-tf /.