Daily American telegraph. [volume] (Washington [D.C.]) 1851-1852, 1852-06-11
Protection from Lightning.

TNHE undersigned being the duly appointed Agent Of
MNGRoD MAEuyAoroRr Coyington Kentucky begs to Offer
these superior Rods OF Spiral twisted Carbonzed Annsaled
IRON win aao Protectors and Electropostys elements
to copper as conducto They in tenee lengths with
brassscrew connecting joints, entire
new style OF metallic patented) attachments, for brick
frame buildngs also, glass solaers, novel and nge-
NOUS constructions patentedD forming lock; the whole
mounted with solid platinum silver point (patentedD
twelve inches long at the with three
lar negative magnets which possess the power extra
most Thunderstorm and embrace the entire perfec
of science To the present time the whole cons-
ting the most magnificent and perfect silent conductor
presented to the public. -e
SAFETY has not been compromised by aording these ex
ceen rods at such low rates the greatest attention has
been given their to be readily attached
The astonishing power of the negative magnets In dscharg
ing the air of its opposite elements has been clearly demon
strated by the Electromeer when unmagnetzed points
have shown but slight results though placed under the
same conditions In fact they gather and silently discharge
electricity from the atmosphere when you would scarcely
These being secured by double letters pa-
tent you hereby cautioned against laying
LIABLE by purchasing Of those who not authorized or
who substituting inferior limitations. All agents duly
appointed show their certificates Have good RODS OF
none. CHARLES w. HEYDON,
Washington City.
do hereby certify that have app lied various powerful
chemical reagents to spras Patent Points for Lightning
Rods that the results these experiments convince
that they will resist the action Of atmospheric causes and
thereby preserve the extremity sharpa condition most
senal to protection against lightning The reagents used
the above experiments solution of chloride of
dunn common salt acec acid sulphurc acid and hydro
chloric acid. With the first, there action ON the
metal; with the several acids, there very stga fact
sufficient 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. Spratt, offered to me-,
are calculated to perform the Office for which they
intended. Yours, truly, Prof ROBT. PETER.
LEXINGTON, KY. February 20, 1850
CHICAGO September 8, 1850.
This may certify that have examined somewhat criti-
cay James Spratts Patent Lightning Rods and that a
opinion that is constructed scientific principles For
combining durability, cheapness, and efficacy deem 1T
equal and think SUPERIOR to amy other ROD ever offered
for IN inspection Prof. JAS. v, y. BLANEY
AUGUSTA, (GA) November IL, 1850
This will certify that have examined the Lightning
Rods, Metallic Points, and Isoating Attachments manu-
featured by m Sprat and regard them as constructed in
conformity to the general laws of the electric fluid and the
metallic compound constituting the Points, as promising
from the result of several tests TO which they submit
ted to resist for years the action OF those atmospheric
most likely to corrode them. A. MEANS,
Prof Phys Sc, 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. spratt appear to to be
very well devised and in point of mechanical construction
the best have ever seen
1t is be hoped that the of these Rods may become
general Important auxiliary defence against danger
which. must be regarded OF ordinary magnitude tc
which all buildings are liable. r. SlLlMAN, Jr,
Prof of Chem in the University of Louisville.
LOUISVILLE, January y, 1851.
All orders left at ANDREW DUFFY'S Stove Mandatory
BELLS Alexandria, Va, of King and St. Aeaph ss
an