Daily American telegraph., 1852-04-30
Protection from Lightning.

J'HE undersigned being the duly appointed Agent of
spRATT's hEcrRIcAS AND ELECTRO AIErAmURGIsT MdnT
NGRop MANDATORY, Coyington Kentucky begs to offer
these superior Rods Spirawted Carbonzed Anneaed
Iron with Zinc Protectors and Electro positive elements
combined in their manufactures thus rendering them equal
to copper conductors They in tenfee ongths with
accurateyttel brass connecting joints, entire
style Of metallic (paented attachments for brick
frame buildings also, glass solaers Of novel and inge
NOUS construction (patcned forming lock; the whole
mounted with solid platinum silver point, (paented)
twelve inches long, surrounded at tho base with three angu
lar negative magnets which possess the power
ordinary extent Of dischargng the opposite elements of the
most fearful Thunderstorm and embrace the entire perc-
ton of science to the present tme the whole consttu
ting the most magnificent and perfect silent conductor ever
presented to the public.
Safety has not been compromised by afordng these
ceent rods at such low rates. the greatest attention has
been given to their construction to be readily attached
The astonishing power Of the negative magnets in scharg
ing the air of its opposite elements has been clearly demon
srated by the Eectromeer, 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 would scarcely
suspect any being present
These improvements being secured by double letters pa
tent you are 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. HEYD0N,
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 and
thereby preserve the extremity sharpa condition most
in the above experiments solution of chloride Of
dunn, common sa acec acid suphuric acid, and hydro
chloric acid. With the first, there action tho
metal; with the several acids, there Sa fact
sufficient 10 show that atmospheric influences would have
sensible effect
JOHN LEcoNTE. Prof Of Nat Phil ct Chem
UNIVERSITY o. Ga, October s, 1850
The Lightning Conductors Of Mr. sprut offered to me-
well calculated TO perform the Office for which they
intended Yours truly. Prof ROBT PETER.
LEXINGTON, KY, February 90 1850.
CHICAGO, September 3, 1850
This may certify that have examined, somewhat crit
cay James Spratts Patent Lightning Rods and that
Of opinion that IL Is constructed scientific principles For
combining durability, cheapnesS, and efficacy deem II
equal and think SUPERIOR TO any other rod ever offered
for my inspection Prof JAS. V. L. BLANEY.
AUGUSTA (GA) November IL, 1850.
This will certify that have examined the Lightning
Rods, Metallic Points, and lsouting Attachments, manu-
featured by Mr. Sprat and regard them constructed in
conformity the general laws Of the electric fluid and the
metallic compound constituting the Points promising,
from the result several which they submit
ted resist years the action Of those atmospheric
most likely 70 corrodc tbom. A. MEANS,
Prof Phys &c. Emory College, Ga, and Prof Chem and
Pharm, Medical College, Ga.
Of this city, the plan OF Mr. sprat appear 20 70 be
very well devised and In point Of mechanical construction
the best have
is 10 be hoped that the Of these Rods may become
general important auxiliary defence against danger
which must be regarded Of ordinary magnitude T.
which all buildings liable. X. SIL1MAN Jr.,
Prof Of Chem in tho University Of Louisville.
LOUISVILLE, January Y, 1851.
All orders left at ANDREW DCFFYS Stove Mandatory
eth street will be promptly attended to- or IT GEORGE
BELLS Alexandria, Va corner Of King and st. Asaph st
an lI-u