Daily American telegraph., 1852-07-19
Protection from lightning.

TNHE undersigned, being the duly appointed Agent Of
NeRop MANUPACToKY Covington Kentucky begs to offer
these superior Rods, of Annealed
combined manufacturer thus rendering them equal
to copper conductors They are in teneet lengths with
accurateytted brass connecting joints entire
style of metallic paente attachments for brick
frame buildings also, glass isolaters, 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 which possess the power to an extra
ordinary extent Of dscharng the opposite eementsof the
most fearful Thunderstorm and embrace the entire perfe
ton of science up to the present tme the whole consttu
ting the most magnificent and perfect silent conductor
presented to the public.
Safety has not been compromised by aordng these
ceen such low rates the greatest attention has
been given their so as TO be readily attached
The astonishing power of the negative magnets IN dscharg
ing the of its opposite elements has been clearly demon
srated by the Electrometer when unmagnetized 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.
These improvements being secured by double letters
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 to sprats Patent Points for Lightning
Rods and that the results Of these convince me
that they will resist the action of atmospheric causes and
thereby the extremity sharpa condition most es
ental protection against lightning The used
dium Common sa acetc aoid sulphurc acid and hydro
choric acid. With the first there action on the
metal; with the several acids, there very ga fact
sufficient to show that atmospheric influences would have
no sensible effect
JOHN LECoNTE Prof of Nat. Phil. ct Chem
UNIVERSITY OF GA, October g. 1850.
The Lightning Conductors of Mr. sprat offered to me,
we'll 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 crt
cay Spratts Patent Lightning Rods and that am
of opinion that 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 v. z. BLANEY.
AUGUSTA, (GA) November H. 1850.
This will certify that have examined the Lightning
Rods Metallic Points, and Isolatng Attachments,
facured by Mr. Sprat and regard them constructed in
conformity the general laws of the electric fluid and the
metallic compound constituting the Points, promising
from the result of several tests to which they submit
ted resist for years 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.
of this city, the plan of Mr. Sprat appear to be
very we'll devised and point of mechanical construction
| the best have ever
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. J.. 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 GEOkGE
BELLS Alexandria, Va corner OF King and St Asaph ss