Daily American telegraph., 1852-05-14
Protection from Lightning.

THE undersigned, being the duly appointed Agent of
SPRATT's ELECTRICIAN ELECTRO METAILuRGIsT LIGHT
MNGRoD MANDATORY, Covngton, Kentucky begs to offer
these superior Rods spratwisted Carbonized Anneaed
Irun with Zinc Protectors and Elecroposive elements
combined in their manufacturer thus rendering them equal
copper conductors They in teneet lengths with
accuratey-fted connecting joints entire
new style of metallic (patened attachments for brick or
frame buildings also, glass isolaters, of novel and inge
NOUS construction (paiented forming lock; whole
mounted with solid platinum silver point, (patened
twelve inches long, surrounded at the with three angu
lar negative which possess the power to an
fearful thunderstorm, and embrace the entire perfec
ton of science to the present tme the whole consu
ting the most magnificent and perfect silent conductor
presented to the public.
Safety has not been compromised by aordng these
ceent rods at such low rates the greatest attention
been given their construction be readily attached
The astonishing of the negative in dscharg
ing the air of its opposite elements has been clearly demon
straed by the Eiscrometer when unmagnetized points
have shown but slight results, though placed under the
same conditions In fact they gather and silently discharge
electricity from the atmosphere when would scarcely
suspect any being present.
tent hereby cautioned against laying yourselves
table, by purchasing Of those who not authorized
appointed show their certificates Have good rods
none. CHARLES W. HEYDON,
Washington City.
do hereby certify that have app lied various powerful
chemical reagents to Sprat Patent Points for Lightning
Rods and that the results these experiments convince
that they will resist the action of atmospheric and
thereby preserve the extremity sharpa condition most
ental protection against lightning The reagents used
the above experiments solution of chloride
dunn, common sa acec acid sulphurc acid 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
OHNLECoNTE. Prof of Nat Phil ct Chem
UNIVERSITY OF Ga, October s, 1850.
The Lightning Conductors of Mr. spratt offered me,
we'll calculated to perform the Office for which they
intended. Yours truly, Prof. ROBT. PETER.
LEXINGTON, KY, February co. 1850.
CHICAGO, September 3, 1850.
This may certify that have examined, somewhat criti-
cay, James Spratts Patent Lightning Rods and that
of opinion that it is 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. " 2. BLANEY.
AUGUSTA, (GA) November IL, 1850.
This will certify that have examined the Lightning
Rods Metallic Points, and Isolang Attachments,
featured by Mr. Spra and regard them constructed in
conformity to the general laws of the electric fluid the
from the result of several tests which they submit
ted resist for years the action of those
most likely to corrode them. A. MEANS,
Prof. Phys. &c.. Emory College Ca 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 to be
very well devised and in point Of mechanical construction
are the best have seen.
to hoped that the of these Rods may become
general important auxiliary defence against danger
which must be regarded Of ordinary magnitude &c
which all buildings liable. r. SILIhIAN, Jr.,
Prof of Chem. in the University of Louisville
LOUISVILLE, January y, 1851.
All orders left at ANDREW DUFFY'S Stove Mandatory
9TH street. will be promptly attended to; at GEohGE
BELLS Alexandria, Va of King and ST. Asaph sts
ap lift