Daily American telegraph., 1852-05-07
Protection from Lightning.

'HE undersigned being the duly appointed Agent of
sPRATTs ELEorRIcAN AND ELECTRO sERAILuRGIsT LIGHT
NNdRoD MANuFAcroRr Covington Kentucky begs to offer
these superior Rods of Carbonzod Anneaed
lron with Zinc Protectors aud Electropostye elements
combined in their manufacturer thus rendering them equal
copper conductors They in eneet lengths with
accurately fitted brass connecting joints entire
style of metallic (patened Attachments for brick
frame budngs also, glass isolaters OF novel and inge
nious eonstEactiop pssented9 forming lGes the whole
twelve inches long, surrounded at the base with three
lar negative magnets which the power to an extra
ordinary extent dschargng the opposite elements Of the
fearful thundersorm and embrace the entire perec
ton Of science up to the present ne the whole const
ting the most magnificent and perfect silent conductor
presented to the public.
Safety not been compromised by aordng these ex-
cent rods at such low rates the greatest attention has
been given their to be readily attached
The astonishing power Of the negative magnets In dchar
strated by the Eectrometer when unmagnetized points
have shown but slight results though placed under the
same 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 hereby cautioned against laying yourselves
LIABLE by purchasing Of those who not authorized,
who substituting inferior limitations All agents duly
appointed can show their certificates Have good rods
none. z ,a.a- CHARLES w. HEYDON,
Washington City.
hereby certify that have app lied various powerful
chemical reagents to spratts Patent Points for Lightning
Rods that the results of these experiments convince
thereby preserve the extremity harpa condition most
sena TO protection against lightning The reagents used
In the above experiments solution Of chloride of
dunn, Common sa acetc acid, suphuric acid and hydro
choric acid With the first, there action the
metal with the several acids there very gha fact
sufficient to show that atmospheric influences would have
sensible effect aG
JOHN LECoNTE, Prof of Nat. Phil OF Chem.
UNIVERSITY OF GA, October 8, 1850. wv.
The Lightning Conductors of Mr. Spratt, offered to me,
are well 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
caly James Sprats Patent Lightning Rods and that
of opinion that constructed scientific principles For
combining durability, cheapness and efficacy, deem it
equal and think SUPERIOR to any other rod offered
for my inspection. Prof JAS. v. 2. BLANEY.
gN.a AUGUSTA, (GA) November IL, 1850.
This will certify that have examined the Lightning
Rods Metallic Points, and Isolatng Attachments
actured by Mr. Spa and regard them constructed in
conformity to the general laws of the electric uid the
from the result of several tests to which they submit
ted to resist for 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 mp by Mr. Henry NJ Smith,
of this city, the plan of Mr. Spratt appear to be
well devised and in point of mechanical construction
are the best have
1t is hoped that the these may become
which must be regarded of ordinary magnitude to
which all buildings are liable. r.. SILTMAN, Jr,
Prof of Chem. in the University of Louisville.
LOUISVILLE, January y, 1851.
All orders left at ANDREW DUFFYS Stove Mandatory,
7th street. will be promptly attended to- or at GEORGE
BELLS Alexandria, Ya of King and st. Asaph sts
ap 1+n