Daily American telegraph., 1852-09-13
Protection from Lightning.

,T,HE undersigned being the duly appointed Agent Of
SPRATrs ELECTRICIAN AND ELECTRO LIGHT
NINdRoD MANDATORY Covingon Kentucky begs to offer
these superior Rods of Sprawsted Carbonzed Annealed
Iron, with Zinc Protectors, and Eectropostve elements
combined in their manufacturer thus rendering them equal
copper conductors They in tenee lengths with
accuratelytted brassscrew connecting JOINTS an enure
style of metallic patente attachments for brick or
frame buildings; also glass solaers of novel and nge
NOUS construction (paented forming lock- the whole
mounted with solid platinum silver point (patented)
twelve long, at the base with three
lar negative magnets which the power TO an extra
fearful Thunderstorm and embrace the entire perec
ton of science to the present times the whole constitu
ting the most magnificent and perfect silent conductor ever
presented to the public
Safety has not compromised by aording these
eent rods at such low rates. tho greatest attention has
been given to their construction to be readily attached
The astonishing of the negative magnets in dscharg
ing the air of Its opposite elements has been clearly demon
trated by the Eiectromeer, 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 are 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. HE1UoN,
Washington City.
do hereby certify that have app lied various powerful
chemical reagents sprats Patent Points for Lightning
and that the results these experiments convince
they will resist the action of atmospheric causes and
thereby preserve the extremity sharpa condition most
sena TO protection against lightning The reagents used
dium common al) acetc acid suphuric acid and hydro
horic acid. With the FIRST there was no action ON the
metal with the several acids there very sg-a 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,
well calculated to perform the Office for which they are
intended Yours, truly, Prof R0BT PETER.
LEXINGTON, KY, February 90 1850.
CHICAGO, September 3, 1850
This may certify that have examined, somewhat criti
ll, m
opinion that IL is constructed scientific principles Por
combining durability cheapness, and efficacy deem it
equal and think SUPERIOR to any other rod offered
for my inspection. Prof JAS. v. r. BLANEY.
AUGUSTA, (GA.) November IL, 1850
This will certify that have examined the Lightning
Rods Metallic Points, and Isoating Attachments manu-
featured by Mr. Spat and regard them constructed in
conformity to general of the electric fluid and the
metallic compound constituting tho Points promising,
the result of several tests TO which they submit
ted TO resist for the action OF those atmospheric causes
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 me to be
very well devsed and in point of mechanical construction,
are the best i have
II Is to be 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. sILIMAN, Jr,
Prof of Chem in the University Of Louisville
LOUISVILLE January q, 1851.
All orders left at ANDREW DUFFYS Stove Mandatory,
eth street. will be promptly attended to- at GEORGE
BELLS Alexandria, Va Of King and St. Asaph sts
ap 14-tf