Daily American telegraph., 1852-09-04
Protection from Lightning,

THE undersigned being the duly appointed Agent Of
SPRATT's ELECTRICIAN ELECTRO METALLURaIsT LaHT-
NNoRoD MANUrAcroRr Covngton, Kentucky begs to offer
these superior Rods of Sprawied Carbonzed Annealed
Iron with Zinc Protectors and Retrospective elements
combined in their manufacturer thus rendering equal
cooper conductors They in teneet lengths with
accuraeytted brass screw connecting JOINTS an entire
style of metallic (patente attachments for brick or
frame budings also, glass isoater OF novel and inge
nous construction a'ented forming lock; the whole
twelve inches long, surrounded at the base with three angu
lar negative magnets which the power to extra
ordinary extent of dchargng the opposite elements Of the
most fearful thunderstorm, and embrace the entire perc
ton of science up to the present times the whole constt
ting the most magnificent aud perfect silent conductor
presented to the public.
Safety has not been compromised by sording these
eent rods at such low rates. the greatest attention has
been given their construction be readily attached
The astonishing power of the negative magnets in scharg
strated by the Eectrometer when unmagnetsed points
have shown but slight results, though placed under the
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 are substituting inferior limitations All agents duly
appointed show their certificates Have good rods
none. CHARLES W. HEYD0N,
Washington City.
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 atmospheric causes and
thereby preserve the extremity sharpa condition most
sential protection against lightning The reagents used
in the above experiments solution of chloride of
dunn common acetic acid suphuric acid and hydro
choric acid. With the FIRST there action the
metal; with the several acids there very siga act
sufficient to show that atmospheric influences would have
sensible effect.
JOHN LEcoNTE, Prof Of Nat Phil. ct Chem
UNIVERSITY OF Ca, October s, 1850.
The Lightning Conductors of Mr.. spratt offered to me-
are well calculated perform the Office for which they are
LEXINGTON, Ky, February 20 1850.
CHICAGO, September 8, 1850.
This may certify that have examined, somewhat criti
caly james spatts Patent Lightning Rods and that
Of opinion that Is constructed centifc principles For
combining durability chcapness, and efficacy, deem IL
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 Isoating Attachments
conformity to the general laws Of the electric uid and the
metallic compound constituting the Points promising
from the result of several tests to which they submit
ted to resist for years the action Of those atmospheric
most likely 10 corrode them. A. MEANS,
Prof Phys Sc, Emory College, Ca and Prof Chem and
Pharm. Medical College, Ga.
The Lightning Conductors put up by MrsHenry NJ smith,
Of this city, the plan of Mr. spra appear to me 70 be
very well devised and IN point Of mechanical construction
are the best have seen.
1t is to be hoped these Rods may become
general important auxiliary defence against danger
which must be regarded Of ordinary magnitude to
which all bulldngs arc liable. r. SILIMAN Jr.,
Prof Of Chem. In the University Of Louisville.
LOUISVILLE, January ~, 1851.
All orders left at ANDREW DUFFYS Stove Mandatory,
eth street. will be promptly attended to, ut GEORGE
BELLS Alexandria, Va corner Of King and st. Asaph sts
PIf-sl