Daily American telegraph., 1852-06-15
Protection from Lightning.

rINHE undersigned being the duly appointed Agent Of
sfRATTs ELECTRICIAN AND Loa s
oRoD MANUPAcToRY Coyington, Kentucky begs TO oier
hese superior Rods OF Spratwisted CarDonleu Anneae
Irop with Zine Protectors and Eectroposuye elements
combined In their manufacturer thus rendering Them equs
70 copper as conductors They in teneet lengths with
brassscrew connecting joints, an entire
new style o. metallic patente attachments for brick or
frame buildings also glass isoaters of novel and nge
NOUS construcdon, paented) forming lock; the whole
mounted WIN sohd platinum silver point, (patented)
twelve inches long, base with three angu
lar negative magnets which possess the power extra
most fearful thunderstorm embrace the entire perfc
ton Of science up to the present me the whole const-
ting the most magnificent and perfect silent conductor
presented to the public
Safety has not been compromised by aording these
ceent rods at such low rates. the greatest attention has
been given their construction to be readily attached
The astonishing Of the negative magnets In dscharg
ing the air OF Its opposite elements has been clearly demon
srated by the Eectromser when unmagnetized points
have shown but slight results though placed under the
conditions In fact they gather and silently discharge
electricity from the atmosphere when you would scarcely
suspect any being present.
These improvements being secured by double letters pa
tent you are hereby cautioned against laying yourselves
liable purchasing of those who not authorized or
who substituting inferior limitations. All agents duly
appointed can show their certificates Have good rods or
none. CHARLES w. HEYDON,
Washington City.
hereby certify that have app lied various powerful
chemical reagents to Spra 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
senal to protection against lightning The reagents used
dunn, common sa acec acid suphuric acid and hydro
chloric acid. With the first, there action the
metal with the several acids, there very Stg-a fact
sufficient show that atmospheric influences would have
no sensible effect
JOHN LECONTE, Prof. of Nat. Phil. ct Chem.
UNIVERSITY OF GA, October s. 1850.
The Lightning Conductors of Mr. Spratt offered to me,
well calculated to perform the office for which they
intended Yours, truly Prof ROBT. PETER.
LEXINGTON, KY. February 20, 1850
CHICAGO September 3, 1850.
This may certify that have examined somewhat criti
caly James Sprats Patent Lightning Rods and that
combining durability, cheapness, and efficacy, deem it
equal and think SUPERIOR to any other rod ever offered
for my inspection Prof. JAS. v. y. BLANEY.
AUGUSTA, (GA) November IL, 1850
This will certify that have examined the lightning
Rods Metallic Points, and soating Attachments, manu-
featured by Mr. Spra and regard them as in
conformity general laws of the electric ud and the
metallic compound constituting the Points, as promising,
from the result of several tests to which they submit
ted resist for years the action of those
most likely to corrode them. A. MEANS,
Prof Phys. &c. Emory College, Ga 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. Spra appear to to be
very well devised and in point of mechanical construction
are the best have ever seen.
1t is be hoped that the of these Rods become
general important auxiliary defence against danger
which must be regarded of ordinary magnitude, to
which all buildings are liable. X. SlLlMAN, Jr,
Prof. Of Chem. in the University of Louisville
LOUISVILLE, January q 1851.
All orders left at ANDREW DUFFY'S Stove Mandatory,
BELLS Alexandria, ya of King and St. Asaph sts
an