Daily American telegraph., 1852-07-24
Protection from Lightning.

rNHE undersigned, being the duly appointed Agent OF
SPRArT's ELEcfRIcAN ELECTRO LIGHT.
KNeRoD MAsuYAcToRI, covington Kentucky bsgs to
these superior Rods of spirawted Carbonzed Anneaed
Iron with Zinc Protectors, and Electroposve elements
combined in manufacturer thus rendering them equal
to copper conductors They in tenee lengths with
style Of metallic (paented attachments for brick or
frame buildings; also, glass solaters and inge
mounted with solid platinum silver point patented
twelve inches long surrounded at the base with three
lar negative magnets which possess the power TO an extra
ordinary extent dschargng opposite elements of the
most fearful Thunderstorm and embrace the entire perfe
on Of science up the present tie the whole constu
ting the most magnificent and perfect silent conductor ever
safety has not been compromised by aordne these ex
ceent rods such low the greatest attention has
been given their construction TO be readily
The astonishing power Of the negative magnets in dscharg
ing the of its opposite elements has been clearly demon
by the Elecrometer when unmagnetized points
have 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 you hereby cautioned against laying yourselves
table, by purchasing of those who not authorised or
who substituting inferior limitations All agents duly
appointed show their certificates Have good rods or
none. CHARLES w. HEYD0N,
Washington City.
do hereby certify that have app lied various powerful
chemical reagents to spratfs Patent Points for Lightning
Rods and that the results of these convince
that they will resist the action Of atmospheric causes and
thereby the extremity harpa condition most
senta TO protection against lightning The reagents used
in the above experiment were solution Of chloride of So
dun Common salt acetic acid suphuric acid and hydro
chloric acid. With the frst there action the
meta with the several acids, there very Sga 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,
we'll calculated to perform the office for which they are
intended. Yours, truly, Prof. ROBT. PETER.
LEXINGTON, KY, February 20, 1850.
CHICAGO, September 3, 1850.
This may certify that have examined, somewhat crt
nalI. tps Data IN
opinion that is constructed scientific principles For
combining durability cheapness, and efficacy, deem
equal and think SUPERIOR to any other rod ever offered
for my inspection. Prof JAS. V. z. DLANEY.
AUGUSTA, (GA) November H. 1850.
This will certify that have examined the Lightning
Rods Metallic Points, and Isolating Attachments
fctured by Mr. Spra and regard them constructed in
conformity to the general laws Of the electric fluid and the
metallic compound constituting the Points, promising
from the result of several tests which they submit
ted to 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
The Lightning Conductors put up by Mr. Henry NJ. Smith,
of this city, the plan of Mr. pratt appear to be
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
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 u, 1851.
All orders left at ANDREW DUFFYS Stove Mandatory,
7h street, will be promptly attended to; at GEORGE
BELLS Alexandria, Va corner Of King and St. Asaph sts
l4-H