Daily American telegraph., 1852-05-27
Protection from Lightning.

IHE undersigned, being the duly appointed Agent of
NGRoD MANUFAcroRI, Covngton, Kentucky, begs to offer
these superior Rods of Spiratwited Carbonized Anneaed
FROM with Zinc Protectors, and Eectroposidye elements
combined in their manufactures; thus rendering them equal
copper conductors They in teneet lengths with
accuraeyftted brass connecting JOINTS an entire
new style Of metallic patente attachmens for brick or
frame buildings ALSO glass isoaters, OF novel and nge
NOUS construction, patented forming lock- the whole
mounted with solid platinum silver point (patentedO
Twelve inches long, at the base with three anu
lar negative magnets which possess the power to extra
fearful thunderstorm embrace the entire perfec,
ton of science up to the present tme the whole constu
ting the most magnificent and perfect silent conductor
presented to the public.
Safety has not compromised by aording these
cnt 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 the air of opposite elements has been clearly demon
trated 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.
These improvements being secured by double letters pa
tent you hereby cautioned against laying
liable by purchasing of those who are not authorized or
who substituting inferior limitations All agents duly
appointed can show their certificates Have good rods
none. CHARLES w. HEYDON,
Washington CITY,
do hereby certify that have app lied various powerful
chemical reagents to Spratts Patent Points for Lightning
Rods and that the results of these experiments convince
that they will resist the action of atmospheric and
thereby preserve the extremity sharpa condition most
senta protection against lightning The reagents used
dium common sat acetc acid sulphurc acid and hydro
choric acid With the first, there action the
metal; with the several acids there very S-a fact
sufficient to show that atmospheric influences would have
JOHNLECoNTE. Prof of Nat Phi. ct Chem
UNIVERSITY OF GA, October 8, 1850
The Lightning Conductors Of Mr.. Spratt, offered to me-
are 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 crit
caly James Spratts Patent Lightning Rods and that
opinion that it is constructed scientific principles For
combining durability, chetpness, and efficacy, deem It
for my inspection. Prot. JAS. V. H. BLANEY.
AUGUSTA, (GA.) November IL, 1850.
This will certify that have examined the Lightning
Rods Metallic Points, and Isolatng Attachments
featured by Mr. Spra and regard them constructed
conformity to the general laws of the electric fluid 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 10 corrode them. A. MEANS,
Prof Phys Sea- 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 be
well devised and in point of mechanical construction
the best have
II is to be hoped that the of these Rods become
general important auxiliary defence against danger
which must be regarded Of ordinary magnitude
which all buildings are liable r. SILIMAN Jr,
Prof of Chem. In the University Of Louisville
LOUISVILLE, January q, 1851.
All orders left at ANDREW DUFFYs Stove Mandatory
BELLS Alexandria, Va Of King and St. Asaph sts
an