Daily American telegraph. [volume] (Washington [D.C.]) 1851-1852, 1852-11-08
Protection from lightning.

rTyHE undersigned being the duly appointed Agent Of
Na-Rop MAsuPAcToRr Covngton, Kentucky, begs to offer
these superior Rods of ratwisted Carbonzed Annealed
combined in their manufacturer thus rendering them equal
cooper conductors They in tenet lengths, with
style of metallic patentea) attachments for brick
frame buildings; also, glass isoaters of novel and fnge
M s sar
twelve inches long, surrounded at the base with three
ordinary extent Of opposite elements Of the
most fearful Thunderstorm and embrace the entire perfec-
ton q science up to the me ths whole son
presented to the public
Safety has not been compromised by aordng these
ceent rods at such low the greatest attention has
been given their construction TO he readily attached
The astonishing OF the negative magnets in discharg
the air its opposite elements has been clearly demon
sraed by the Eectrometer when unmagnetiaed points
have shown but slight results though placed under the
conditions In fact they gather and silently discharge
electricity from the atmosphere when yon would scarcely
suspect any being present
tent you hereby cautioned against laying yourselves
liable by purchasing Of those who are not authorized or
appointed show their certificates Have good rods or
CHARLES w. HEfDON,
Washington City.
do hereby certify that have app lied various powerful
Rods and that the results OF these experiments convince
they will resist the action of atmospheric causes and
thereby preserve the extremity shorpa condition most
sena protection against lightning The reagents used
in the above experiments were solution OF chloride ofRo
dunn, common aCeuc
chlorc acid With the first, there action the
metal with the several acids, there very gha fact
sufficient to show that atmospheric Influences would have
no sensible effeet.
JOHN LECoNTF, Prof Of Nat. Phil. ct Chem
UNIVERSITY OF Ga, October s, 1850.
The Lightning Conductors of Mr. sprat offered to me,
well calculated 10 perform the office for which they
intended. Yours, truly Prof R0BT PETER
LEXINGTON, Kr. February 20, 1850.
CHICAGO, September 8, 1S505
This may certify that have examined, somewhat crit.
cay, james Sprats Patent Lightning Rods and that
opinion that 1t is constructed scientific principles For
combining durability, cheapness and efficacy, deem it
equal and think superior to amy other rod ever offered
for my inspection Prof JAS V. Z. BLANEY.
AuoUsTA, (GA.) November H. 1850.
This will certify that have examined the Lightning
Rods, Metallic Points and Isolaing Attachments,
featured by Mr. spra ana regard them constructed in
conformity the general laws Of the electric ud and the
metallic compound constituting tho Pcnts, promising,
from the result several tests 10 which they submit
ted resist for the action of those atmospheric
most likely 10 cerrode them. A. MEANS,
Prof Phys &c. Emory College, Ga, and Prof Chem. ana
Phsrm. Medical College, Ga.
The Lightning Conductors put up by Mr. Henry VI. Smith,
of this city the plan OF Mr. sPrat appear 10 me to be
very well devised and in point mechanical construction,
the best have seen.
1t IL TO be hoped that the Of these Rods become
general important auxiliary defence against danger
which must be regarded OF ordinary magnitude 10
which all buildings are liable. X. SILIAiAN, Jr.,
Prof Of Chem. in the University Of Louisville.
LOUISVILLE, January q, 1851
All orders left at ANDREW DUFFYs Stove Mandatory
7h street, will be promptly attended TO; or at GEORGE
BELLS, Alexandria, Va Of King and st. Asaph SITS
apl4-n