Daily American telegraph. [volume] (Washington [D.C.]) 1851-1852, 1852-09-17
Protection from Lightning.

,HE undersigned, being the duly appointed Agent Of
ROD MANDATORY Covingon Kentucky, begs to offer
these superior Rods Of Spirawsted Carboned Anneaed
Iron, with Zinc Protectors and Electroposye elements
combined in their manufacturer thus rendering them equal
to copper conductors They are in teneet lengths with
new style of metallic paented attachments, for brick
frame buildings; ALSO glass olaers, OF novel 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 extra
ordinary extent schargng the opposite elements Of the
most fearful Thunderstorm and embrace the entire perfe
ton Ct science up TO the present tme the whole consttn
ting the most magnificent and perfect silent conductor ever
presented to the public
Safety has not been compromised by aording these
eeRt rods at such low rates. the greatest attention has
been given TO their be readily attached
The astonishing Of the negative magnets in dcharg
ing the air OF Its opposite elements has been clearly demon
srsted by the Electrometer, when unmagnetsed 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
tent you hereby cautioned against laying yourselves
liable by purchasing of those who not authorized
who substituting inferior limitations All agents duly
appointed show their certificates Have good rods
none. CHARLES W. HEYD0N,
Washington City.
do hereby certify that have app lied various powerful
Ghemica reagens 70 spratts Patent Poins Tor gntnng
that they win resist the action Of atmospheric causes and
thereby preserve the extremity most e
senta 10 protection against lightning The reagents used
In the above experiments solution Of chloride Of
dum common sat) acec acid sulphurc acid, and hydro
chlorc acid With the first, there action on the
mets with the several acds there very sga fact
sufficient to show that atmospheric influences would have
sensible effect
JOHN LEcoNTE, Prof of Nat Phil etchsm
UNIVERSITY OF Ga, October s, 1850.
The Lightning Conductors Of Mr. spratt offered to me-
intended. Yours, truly, Prof R0BT. PETER.
LEXINGTON, Kr, February 20, 1850.
CHICAGO, September 8, 1850.
This may certify that have examined somewhat crt
cay, James sprats Patent Lightning Rods, and that
OF opinion that il IL constructed scientific principles For
combining durability, chespnsss and efficacy, deem II
equal and think SUPERIOR to any other rod offered
for my inspection. Prof JAS v. z. BLANEY.
Augusta, (GA.) November IL, 1880.
This will certify that have examined the Lightning
Rods, Metallic Points, and Isolatng Atachmens
featured by Mr. sprat 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 several tests which they submit
most likely to corrode them. A. MEANS,
Prof Phys Sc, Emory College Ga and Prof Chem. ana
Pharm, Medical College, Ca
The Lightning Conductors put up by Mr. Henry NJ Smith,
Of this city, the plan Of Mr. Sprstt TO me TO be
very well DEVISED and In point Of mechanical construction,
the best / have
II IL he 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. sILIMAE, Jr,
Prof Of Chem In the University Of Louisville
LOUISVILLE, January q, 1851.
An orders LEFT at ANDREW DUFFYs Stove Mandatory
It'll street. will be promptly attended TO; at GEORGE
BELLS Alexandria, Va corner Of King and St Asaph SITS
14-u