Daily American telegraph., 1852-11-10
Protection from Lightning,

TNHE undersigned, being the duly appointed Agent OF
sPEATTs ELECTRICIAN AND ELECTRO METAILURaIsT LIGHT
Ming Rob MANDATORY, Covington Kentucky, begs offer
these superior Rods, of Carbqnzcd Annealed
Iron. with Zinc Protectors, Electroposy elements
combined manufactured thus rendering them equal
to copper conductors They In teneet lengths with
accurateyted brass screw connecting Joints an entire
style metallic atented) attachments for brick or
frame buildings ALSO glass solaers of novel and inge
mounted with solid platinum silver point patented9
twelve inches long, surrounded at the base with three
lar negative magnets which possess the power
ordinary extent dschargng the opposite elements
most fearful Thunderstorm, and embrace the entire perec
ton Of science up to the present time the whole consttu
presented To the public.
Safety has not been compromised by aording these ex
ceent rods at such low rates. the greatest attention has
been given their construction to be readily attached
The astonishing power of the negative magnets in dcharg
the air of its opposite elements has been clearly demon
sraed by the Electromeer. when unmagnetized points
have shown but slight results though placed under the
conditions Ia fact they gather and silently discharge
electricity from the atmosphere when would scarcely
suspect any being present
tent you hereby cautioned against laying yourselves
liable by purchasing Of those who not authorized
who substituting inferior limitations All agents duly
appointed show their certificates Have good rods
CHARLES w. HEYDON,
Washington City.
do hereby certify that have app lied various powerful
Rods and that the results of these experiments convince
that they will resist the action Of atmospheric causes
thereby preserve the extremity sharpa condition
sena to protection against lightning The reagents used
in the above experiments solution of chloride Of
chlorc acid ths first there was action the
metal with the several acids, there very -a fact
sufficient to show that atmospheric influences would have
JOHN LECoNTE Prof Of Nat Phil etchem
UNIVERSITY OF 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. --f
CHICAGO, September 1891
This may certify that have examined, somewhat crii-
cay, James Sprats Patent Lightning Rods and that
Of opinion that it is constructed scientific principles For
combining durability, cheapness and efficacy, L deem il
equal and think SUPERIOR to any other rod ever offered
for my inspection, Prof JAS. V. r. BbANEY
AUGUSTA, (GA.) November II, 1850.
This viii certify that have examined the Lightning
Rods Metallic Points, and Isolatng Attachments
featured by Mr. Sprat 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 which they submit
ted resist for years the action Of those atmospheric
most likely TO cerrode them. A.MEANS,
Prof Phys Sc, Emory College, Ca and Prof Chem and
Pharm, Medical College, Ga.
The Lightning Conductors put up by Mr. Henry NJ Smith,
this city, the plan Of Mr. SPrst appear TO TO be
very well devised and in point Of mechanical construction
the best have
IL is to be hoped that the Of these Rods become
general important auxiliary defence against danger
which must be regarded of ordinary magnitude,
which all buildings are liable. r. SLIIMAN, Jr.,
Prof Of Chem in the University OF Louisville
LOUISVILLE, January q, 1851.
All orders left at ANDREW DUFFY'S Stove Mandatory,
9TH street. will be promptly attended to- ut GEQkGE
BELLS Alexandria Va Of King and st. Asaph SIS.
ap 14-u