Daily American telegraph., 1852-05-29
Protection from lightning.

EINHE undersigned being the duly appointed Agent OF
SPRAFT's ELECTRICIAN ELECTRO METALLURGIsT LIGHT
NNaRoD MANuFAcroRY coyngton, Kentucky, begs offer
these superior Rods Of palwisted Carbonized Anneaed
Iron with Zinc Protectors and Eectropositiye elements
combined in their manufacture; thus rendering them equal
copper conductors They are in teneet lengths with
accurately -ed brassscr connecting joints. entre
new style Of metallic patented attachments for brick
frame buildings; ALSO glass solaers Of novel inge
nous construction (palenedO forming lock; the whole
mounted with solid platinum silver point, (patented)
inches long, surrounded at the base with three
lar negative magnets which possess the power to an extra
ordinary extent Of dscharging the opposite elements
fearful Thunderstorm and embrace the entire perfec
ton of science up to the present time; the whole const
ting the most magnificent and perfect silent conductor
presented to the public
Safety has not been compromised by aording these ex
ceent rods such low rates the greatest attention
been given their 20 as TO be readily attached
The astonishing Of the negative magnets in discharg
ing the air of its opposite elements has been clearly
srated by the Electrometer 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 #Ht.E
tent you hereby cautioned against laying yourselves
LIABLE by purchasing of those who are not authorized
who are substituting inferior limitations All agents duly
none CHARLES W. HEYDoN,
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 ATMOSPHERIC causes and
thereby preserve the extremity condition most
sentia protection against lightning The reagents used
in the above experiments solution Of chloride of
dunn Common SALTY acec acid sulphurc acid hydro
chlorc acid With the first there was action the
metal with the several acds there very sgha
sufficient to show that atmospheric influences would have
no sensible effect eHrME t#s
JOHN LEoONTE, Prof of Nat. Phil ct Chem
UNIVERSITY GA. October s, 1850
The Lightning Conductors Of Mr.. sprat offered to me-
well calculated to perform the Office for which they
intended, Yours, truly, Prof ROBT. PETER.
LEXINGTON, KY, February 20, 1850.
..H l" CHICAGO, September 8, 1850
This may certify that have examined, somewhat criti
cally James Spratts Patent Lightning Rods and that
of opinion that 1t is constructed scientific principles For
combining durability cheapness, and efficacy, deem it
equal and think SUPERIOR to other rod ever offered
for my inspection. Prof JAS v. Q. BLANEY.
AUGUSTA, (GA.) November H. 1850. "
This will certify that have examined the Lightning
Rods Metallic Points, and Isolatng Attachments
featured by Mr. Sprat and regard them constructed in
conformity the general laws of the electric fud and the
metallic compound constituting the Points, promising
from the result of several tests to which they submit
cd 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. Spra appear to be
very well devised and in point of mechanical construction
are the best have
1t be hoped that the of these Rods may become
general important auxiliary defence against danger
which must be regarded of ordinary magnitude,
which all buildings are liable r. SILIMAN, Jr.,
H.t Prof Of Chem. in the University of Louisville
LOUISVILLE, January 2 1851.
All orders left at ANDREW DUFFYS Stove Mandatory
It'll street, will be promptly attended to- at GEORGE
BELLS Alexandria, Va of King and St. Asaph sts
APP 14-tf t.@