Daily American telegraph. [volume] (Washington [D.C.]) 1851-1852, 1852-10-07
Protection from Lightning.

THE undersigned, being the duly appointed Agent Of
NeRoD MANurAcroRr, Covington Kentucky begs to offer
these superior Rods of Carbonzed Annealed
combined in their manucture thus them equal
to copper conductors They are In tenet lengths with
accurately oonnseng joints an entire
frame buidings Also glass solater OF novel and inge
NOUS construction, patented0 forming lock- the whole
mounted with solid platinum silver point (patented,)
twelve inches long, surrounded at the base with three angu
lar negative magnets which the power to extra
fearful thunderstorm and embrace the entire perec
ton Of science to the present time; the whole oonsttu
ting the most and perfect silent conductor ever
Safety has not been compromised by aording these
ceen rods at such low rates the greatest attention has
been given their construction be readily attached
The astonishing power of the negative in dscharg
strated by the Elscrometer when unmagnetaed points
have shown but slight results though placed under the
same 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
who substituting inferior limitations All agents duly
nome CHARLES v y. mESDo II.
do hereby certify that have app lied various powerful
chemical reagents to spratts 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 SHARPE condition most
sentia to protection against lightning The reagents used
in the above experiments were solution Of chloride Of SO
dunn common sat acec acid suphuric acid and hydro
chloric acid With the first, there action the
metal with the several acds there VERY sgha fact
sufficient to show that atmospheric influences would have
sensible effect .Ia4f
JOHN LEcoNTE, Prof Of Nat. Phil etchem
UNIVERSITY OF GA, October s, 1880. aH
The Lightning Conductors Of Mr. spratt, offered to me,
well calculated TO perform the Office for which they
LEXINGTON, XII, February 20, 1850.
CHICAGO, September Q, 1851
This may certify that have examined somewhat criti
cally Sprafts Patent Lightning Rods, that
Of opinion that II 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. z. BLANEY.
SO AUGUSTA, (GA.) November II, 1850.
This will certify that have examined the Lightning
Rods Metallic Points, and Iolang Attachments,
featured by Mr. Spra and regard them constructed in
conformity to the general laws of the electric fluid and the
metallic compound constituting the Points promising,
from the result of several tests TO which they submit
most likely 10 corrode them. - IT A MEANS,
Prof Phys Sc, Emory College, Ga, and Prof Chem and
Pharm., Medical College Ga.
The Lightning Conductors put up by Mr. Henry Smith,
this city, the plan Of Mr. Spra appear to to be
very ~ devised and in point of mechanical construction,
the best have ever seen. E9ag
II Ia To be hoped that the these Rods may become
general as an important auxiliary defence against danger
which be regarded Of no ordinary magnitude TO
which ali buildings are liable. r.. sILIMAN, Jr,
Prof Of Chem. in the University Of Louisville.
LOUISVILLE, January n, 1851 Ill.
All orders left at ANDREW DUFPYS Stove Mandatory,
7th street. will be promptly attended TO; or at GEORGE
BELLS Alexandria, ya corner Of King and st. Asaph ss.
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