Daily American telegraph., 1852-04-14
Protection from Lightning.

FNHE undersigned being the duly appointed Agens OF
NSGRoD MASuFAoroRY Coyington Kentucky begs to offer
these superior Rods of Spratwisted Anneale
Iron, with Zine Protectors, and EectroPosnve elements
combined in their manufacturer thus rendering them equal
to copper conductors They are in teneet ength Win
accurately fitted brassscrew connecting joints, entire
new style of metallic atented attachments for brick
frame buildngs also glass isoater OF novel ana inge
NOUS construction Psented forming ane wnIie
twelve inches long surrounded at the base with three anu
lar negative magnets which possess the power to an extra
ordinary extent Of dischargng the opposite elements OF the
most fearful Thunderstorm and embrace the entire periec
ton science up to the present me the whole consttu
ting magnificent anu perfect silent conductor ever
presented TO the public
celent rods at such low rates. the greatest attention has
given their construction 80 as to be readily attached
The astonishing power of the negative magnets IN dchar
ing the air OF its opposite elements has been clearly demon
strated by the Elecrometer when unmagnetlzed points
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
suspect any being present ..
tent you hereby cautioned against laying yourselves
liable by purchasing of those who not authorized or
who substituting inferior limitations All agents duly
appointed show their certificates Have good rods or
none. CHARLES W. nEiDoN,
Washington City
hereby certify that have applied various powerful
chemical reagents to spratts 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
senta protection against lightning The reagents used
above experiments solution of chloride OF
dunn common sat acetc acid suphuric acid and hydro
choric acid With the first, there action 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 ct Chem.
UNIVERSITY OF Ga, October 8, 1850.
The Lightning Conductors of Mr.. sprat, offered to
well calculated to perform the Office for which they
| intended. Yours truly, Prof ROBT. PETER.
LEXINGTON, KY, February 90 1850.
CHICAGO, September g. 1850.
This may certify that have examined, somewhat crt
cay James Spratts Patent Lightning Rods and that
opinion that is constructed scientific principles For
combining durability, cheapness, and efficacy, deem il
equal and think SUPERIOR to any other rod offered
for my inspection. Prof. JAS. V. H. BLANEY.
AUGUSTA, (GA) November IL, 1850.
This will certify that have examined the Lightning
Rods, Metallic Points and Isoating Attachments, manu-
featured by Mr. Spra and regard them constructed in
conformity 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
ted to 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
Phau, Medical College, Ga.
The Lightning Conductors put up by Mr. HenrysI smith,
of this city, the plan Of Mr. Sprat appear to me to be
we'll devised and in point ofmecbanca construction
the best have
II is to hoped that the of these Rods may become
general important auxiliary defence against danger
which must be regarded of ordinary magnitude to
which all buildings are liable. II. SILlMAN, Jr..
Prof of Chem. in the University of Louisville
LOUISVILLE, January 27, 1861
All orders left at ANDREW DUFFY'S Stove Mandatory,
7th street. will be promptly attended to- at GEORGE
BELLS Alexandria, Va Of King and St Asaph sts
lift