Daily American telegraph., 1852-07-27

rHE undersigned, being the duly appointed Agent Of
SPRATT's ELEoTIoAN AND ELECTRO METAILURGIsT LIGHT
NGRoD MANURAcToRI Coyington Kentucky, begs to offer
these superior Reds Of Spiral Carbonized Anneaied
IRON with Zinc Protectors, and Electroposnye elements
combined In their manufacturer thus rendering them equal
copper conductors They in teneet lengths with
aecuratelytted brassscrew connecting joints an entire
new style OF metallic patented) attachments, Tor brick OF
frame buildings; Also glass solaers Of novel ana lnge
NOUS construction, (patented forming lock; the whole
mounted with solid platinum silver point (patented,)
twelve inches long, at the base with three angu
lar negative magnets which possess the power TO an extra
most fearful thunderstorm, and embrace the entire perec
ton of science to the present tme the whole eonsttu
ting the most magnificent and perfect silent conductor ever
Safety has not been compromised by aordng these ex
cent rods at such low rates. the greatest attention has
been given their construction be readily attached
The astonishing power of the negative In dscharg
ing the air of its opposite elements has been clearly demon
grated by the Eiectromeer, when unmagnezed 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
LIABLE by purchasing of those who not authorized or
who substituting inferior limitations. All agents duly
none. CHARLES w. HEYDON,
Washington City.
hereby certify that have app lied various powerful
chemical Reagents to spras 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 es
sental protection against lightning The reagents used
In the above experiments solution of chloride Of
dunn common sa acetc acid sulphurc acid and hydro
choric acid. With the first, there action on the
metal with the several acids, there very stgha fact
sufficient show that atmospheric influences would have
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
intended Yours, truly Prof RoBT. PETER.
LEXINGTON, KY. February 20, 1850.
CHICAGO September 3, 1850.
This may certify that have examined somewhat criti
cay James Sprats Patent Lightning Rods, and that am
Of opinion that it constructed scientific principles For
combining durability, cheapness and efficacy, deem it
equal and think superior to any other rod ever offered
for my inspection Prof JAS. v. Y. BLANEY.
AUGUSTA, (GA) November II, 1850
This will certify that have examined the Lightning
Rods Metallic Points, and Isolatng Attachments, manu-
featured by Mr. Spra and regard them as constructed in
conformity to the general laws of the electric ud and the
metallic compound constituting the Points promising,
the result of several tests which they submit
ted resist for the action Of those atmospheric
most likely to corrode them A. MEANS,
Prof Phys. Sc. 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
well devised and In point OF mechanical construction
the best have
1t Is to be hoped that the of these Rods become
general important auxiliary defence against danger
which must be regarded OF ordinary magnitude to
which all buildings are liable. II. SILIMAN, Jr,
Prof Of Chem in the University of Louisville.
LOUISVILLE, January 27, 1851
All orders left at ANDREW DUFFYS Stove Mandatory,
BELLS Alexandria, Va Of King and st. Asaph SITS
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