Daily American telegraph., 1852-07-08
Protection from Lightning.

rHE undersigned, being the duly appointed Agent Of
srRAIrs ELEcrRlcAs AND ELeofso, h hes' !, %
these superior Rods OF Spiralwtei Carooseu Anneaaa
on with Zine Protectors, aud Electroposuye eemen.s
combined in their thus rendering them equal
70 copper conductors They in teneet engts win
brass connecting joints an entire
new OF metallic patented) attachments Tor priek OF
frame buidings also glass solaers of novel and inge
NOUS construction (paienedD forming locks the whole
twelve inches long, base with three angu
lar negative magnets which possess the power extra
most fearful Thunderstorm embrace the entire pere
ton of science up to the present time; the whole eonst
ting the most magDhcent and perfect silent
presented to the public .sf
Safety has not been compromised by aording these ex
ceent rods such low rates the greatest attention has
been given their construction be readily attached
The astonishing power of the negative dsehar
Ing .ns a m y ha 10 when unmarnsaeS sa
shown but slight results though placed under the
conditions In fact, they gather and silently discharge
electricity from the atmosphere when you wouln scarcely
suspect any being present. t"
These improvements being secured by double letters
tent you hereby cautioned against laying yourselves
table, by purchasing of those who not authorized or
who substituting inferior limitations. All agents duly
appointed show their certificates Lave good RODS or
none. CHARLES ". HEYDoN,
Washington City.
do hereby certify that have app lied various powerful
chemical reagents to spras 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
senta protection against lightning The used
the above experiments solution of chloride of
dium Common sa acetic acid sulphurc acid and hydro
chloric acid. With the FIRST there action the
metal; with the several acids, there very sga fact
sufficient 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. eprat offered to me-
well calculated to perform the Office for which they are
intended. Yours, truly Prof ROBT. PETER.
LEXINGTON, KY. February 20, 1860.
CHICAGO, September 8, 1850.
This may certify that have examined somewhat crt
opinion that is 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. q. BLANEY.
AUGUSTA, (GA.) November H. 1850.
This will certify that have examined the lightning
Rods Metallic Points, and Isolang Attachments, manu-
featured by Mr. Spr and regard them as constructed in
conformity to the general laws of the electric uid and the
metallic compound constituting the Points, as promising
from the result tests to which they submit
ted resist years the action of those atmospheric
most likely to oorrode 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 Smith,
of this CITY, the plan of Mr. Spra appear to to be
very well devised and point of mechanical construction
are the best have ever
to be 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. r. SILIMAN, Jr,
Prof of Chem. in the University of Louisville.
LOUISVILLE, January 27, 1851 #
All orders left at ANDREW DUFFYS Stove Manufactory
7th street, will be promptly attended to; or at GEOhdE
BELLS Alexandria, Va of King and St. Asaph sts
ap 1-f h.