Daily American telegraph., 1852-06-28
,Protection from Lightning.

Fyfn pndsrsigned being the duly appointed Agent OF
ROD M4UFAcToRr Covingon Kentucky begs to offer
these superior Rods Of Csrbonised Anneaso
combined in their thus rendering them equal
20 copper a. conductors They in teneet lengths with
new style Of metallic atented for brick or
msme ouildngs also glass solaers of novel and inge
mounted with solid platinum rns Sl9er point patentsd
inches long at the with three
ordinary extent diachagng the opposite eements Of the
most esr @ @ and embrace the entire perfec
ting the most and perfect silent conductor ever
SAFETY has not been compromised by aordnc t,sss e
ceent rods at such low rates the attention has
given TO their construction 70 be readily attached
The astonishing power Of the negative magnets dscarg
ing the of its opposite elements has been clearly demon
srated by the Electrometer when unmagnetized points
have but slight results though placed under the
conditions fact they gather and silently discharge
electricity from the atmosphere whom you would scarcely
suspect any being present
These improvements being secured by double letters pa
tent you hereby cautioned against laying yourselves
liable by purchasing who not authorized,
who substituting inferior limitations All agents duly
appointed show their certificates Have good rods or
none CHARLES w. HEfDON,3
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 experiments convince
that they will resist the action Of atmosphere causes and
thereby preserve the extremity harpa condition most es
enal to protection against lightning The reagents used
in the above experiments solution OF chloride of So
choric acid. With the first, there action on the
METAL with the several acids there very sg-a fact
sufficient to show that atmospheric influences would have
no sensible effect. -
JOHN LECoNTE, Prof of Nat Phil ct Chem.
UNIVERSITY OF GA. October S, 1850 y,
The Lightning Conductors of Dir. spratt, offered to me,
are well calculated to perform the Office for which shsy are
LEXINGTON, KY, February 20, 1860.
CHICAGO, September g. 1850
This may certify that have examined, somewhat crk
cay, james Sprats Patent Lightning Rods and that at
of opinion that is constructed scientific principles For
combining durability, cheapness and efficacy, deem 1t
equal and think SUPERIOR to other rod ever offered
for my inspection Prof JAS " H. BLANEY
AUGUSTA, (GA.) November IL 1850
This will certify that have examined the Lightning
Rods, Metallic Points, and Isolang Attachments manu-
conformity to the laws of the electric ud and the
metallic compound constituting the Points promising,
from the result of several tests to which they submit
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.
The Lightning Conductors put up by Mr. Henry NJ Smith,
of this city, the plan of Mr. Sprat appear to to be
very well devised and in point OF mechanical construction
are the best have
1t is to be hoped that the use Of these Rods may
which must be regarded of ordinary magnitude, to
which all buildings are liable. R. SILIMAN, Jr.,
Prof of Chem in the University Of Louisville
LOUISVILLE, January u, 1851.
All orders left at ANDREW DUFFY'S Stove Mandatory,
7th street. will be promptly attended to; at GEORGE
BELLS Alexandria, Va OF King and St. Asaph SITS.
ap 14-tf