Daily American telegraph., 1852-07-26
Protection from Lightning.

rHE undersigned, being the duly appointed Agent Of
MNaoD MAsupAcroRY Covington Kentucky bsgs TO offer
these superior Rods of Carbonzed Anneaed
Iron with Zinc Protectors, and Electropostve elements
combined in their manufactured thus rendering them equal
copper conductors They in tenee lengths with
style Of metallic (patented attachments for brick or
ame buildings also, glass solaters, Of novel and inge
NOUS construction Patented forming lock- the whole
mounted with solid platinum silver point (patented)
twelve inches long, surrounded at the base with three
lar negative magnets which possess the power 70 extra
ordinary extent Of dschargng the opposite elements
most fearful Thunderstorm and embrace the entire perec
ton Of science TO the present times the whole const
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 power Of the negative magnets in dcharg
ing its opposite elements has been clearly
strated by the Elecrometer 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 So
These improvements being secured by double letters pa
tent you hereby cautioned against laying yourselves
table, by purchasing of those who not authorized or
who substituting inferior limitations All agents duly
appointed show their certificates Have good rods or
none. CHARLES W. HEfDoN,
Washington City.
do hereby certify that have app lied various powerful
chemical reagents Spratts Patent Points for Lightning
Rods and that the results Of these experiments convince me
that they will resist the action of atmospheric causes and
thereby preserve the extremity harpa condition most
senta protection against lightning. The reagents used
du common SALT acetic acid sulphuric acid and hydro
chlorc acid With the first, there no action on the
meta with the several acids there very Sga fact
sufficient to show that atmospheric influences would have
no sensible effect.
JOHN LECoNTE, Prof of Nat Phil. ct Chem
UNIVERSITY OF Ga, October s, 1850
The Lightning Conductors of Mr.. Sprat offered to me,
well calculated 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 crt
caly James Spratts Patent Lightning Rods and that
combining durability cheapness and efficacy, deem 1t
equal and think SUPERIOR to any other rod ever offered
for my inspection. Prof JAS v. q. BLANEY.
AUGUSTA, (GA.) November H. 1850.
This will certify that have examined the Lightning
Rods Metallic Points, and Isolatng Attachments manu-
factured by Spra and regard them constructed in
conformity the general laws of the electric fluid and the
metallic compound constituting the Points, promising
from the result several tests which they submit
ted resist for the action OF those causes
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 M. Smith,
of this city, the plan of Mr. pratt appear to be
very well devsed and in point of mechanical construction
the best have
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 Y, 1851.
All orders left at ANDREW DUFFY'S Stove Mandatory
7h street, will be promptly attended to; at GEORGE
BELLS Alexandria, Va of King and ST. Asaph sts
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