Daily American telegraph. [volume] (Washington [D.C.]) 1851-1852, 1852-09-10
Protection from lightning,

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NHE' undersigned being the duly appointed Agent Of
SpRATr's ELEcTRIcAN ELECTRO METALLURdIsT LIGHT
sSaRoD coyngton kentasky pegs 70 oneT
Iron with Zinc Protectors and Elecropostys elements
combined in their manufacturer thus rendering them equal
conductors They in eneet lengths, with
brassscrew connecting joints, entire
style of metallic (patened attachments for brick or
frame buildings ALSO glass isoaters, Of novel and inge
NOUS construction (patented forming lock- the whole
mounted with solid platinum silver point, patented0
twelve inches long, surrounded at the base with three angu
negative magnets which possess the power to extra
ordinary extent dscharng the opposite elements Of the
most fearful Thunderstorm embrace the entire perfec
ton science up the present time the whole consu
ting the most magnificent and perfect silent conductor ever
presented to the public
Safety has not been compromised by aordng these
ceent rods at such low rates the greatest has
been given to their so as to be readily
The astonishing power of the negative magnets in discharg
ing the air of its opposite elements has been clearly demon
srated by the Elecrometer when unmagnetized 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
These being secured by double letters pa
tent you hereby cautioned against laying yourselves
who are substituting inferior limitations All agents duly
appointed show their certificates Have good rods or
none. CHARLES w. HEfDON,
Washington City.
do hereby certify that have app lied various powerful
chemical reagents to spratt Patent Points for Lightning
Rods and that the results Of these experiments convince me
that they will resist the action Of atmospheric causes and
thereby preserve the extremity condition most
senta 10 protection against lightning The reagents used
experiments solution Of chloride of
dum common salt acetc acid suphuric acid and hydro
chlorc acid With the FIRST there action on the
metal with the several acids there very sga fact
sufficient to show that atmospheric influences would have
no sensible effect.
JOHN LEcoNTE, Prof of Nat. Phil. etChem.
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 RoBT. PETER.
LEXINGTON, Kr., February 20, 1880
CHICAGO September 3, 1850.
This may certify that have examined somewhat criti
cay James spratts Patent Lightning Rods, and that am
OF opinion that II Is constructed scientific principles For
combining durability chespness, and efficacy, deem II
for my inspection. Prof. JAS. " 2. BLANEY.
AUGUSTA, (GA) November IL, 1850.
This will certify that 1 have examined the Lightning
Rods Metallic Points, and Isoating Attachments, manu-
featured by Mr. sprat and regard them constructed In
conformity 10 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 resist years the action Of those atmospheric
most likely 10 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, ON the plan Of Mr. spra appear TO TO be
very well devised and in point Of mechanical construction,
are the best have
IL IL to be hoped that the OF these Rods may become
general important auxiliary defence against danger
which must be regarded as Of no ordinary magnitude, 70
which all buildings are liable. r. SILIMAN, Jr.,
Prof Of Chem in the University Of Louisville.
LOUISVILLE, January n, 1851.
All orders left at ANDREW DUFFYS Stove Mandatory,
BELLS Alexandria, Va, Of King and ST. Asaph sts
an l4-tf