Daily American telegraph. [volume] (Washington [D.C.]) 1851-1852, 1852-11-13
Protection from Lightning.

fyHE undersigned, being the duly appointed Agent OF
SpRATTs ELECTRICIAN AND ELECTRO METALLURGIsT LaHT
Ron MANUrAcroRT, Covingon Kentucky begs to offer
these superior Rods spratwsted Carbonzed Annealed
Iron with Zinc Protectors, and Eectropostye elements
combined in their manufactures thus rendering them equal
copper conductors They In tenee lengths with
accurately fitted brass connecting JOINTS entire
style of metallic patented attachments, for brick
frame buldngs also glass isolaters of novel and nge
mounted with SOLD platinum silver point (patented)
twelve inches long, at the base with three angu
lar negative magnets which the power to extra
ordinary extent OF dschargng the opposite elements Of the
most fearful Thunderstorm and embrace the entire perc
ton Of science TO the present me the whole constitu
ting the most magnificent and perfect silent conductor
presented TO the public.
Safety has not been compromised by aording these
cesnt rods at such low rates. the greatest attention has
been given their construction be readily attached
The astonishing of the negative magnets In dscharg
ing the air of M opposite elements has been clearly
strsted by the Eectrometer, when unmagnezed points
have shown but slight results though placed under the
conditions In fact they gather silently discharge
electricity from the atmosphere when would scarcely
These being secured by double letters pa.
tent hereby cautioned against laying yourselves
table, by purchasing of those who not authorized,
who substituting inferior limitations All agents duly
appointed can ahow their certificates Have good rods or
none. CHAhLES W. HEYDON,
Washington City.
do hereby certify that app lied various powerful
chemical reagents to spats Patent Points for Lightning
Rods and that the results Of these experiments convince
that they will resist the action of atmospheric and
thereby preserve the extremity sharpa condition
enal to protection against lightning The used
dium, common salt) acec acid suphuric acid hydro
ehlorio acid With the first, there action the
metal; with the several acids there slg-a fact
sufficient to show that atmospheric influences would have
sensible effect.
JOHN LECoNTE, Prof of Nat. Phil. etC 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 R0BT. PETER.
LEXINGTON, KY, February 20, 1885,
CHICAGO September 8, 1851
This may certify that have examined somewhat crit
eay James spratts Patent Lightning Rods and that
of opinion that 1t is constructed scientific principles For
equal and think superior any other rod offered
for my inspection Prof JAS. " y. BLANEY.
AUGUSTA, (GA) November IL, 1880.
This will certify that have examined the Lightning
Rods, Metallic Points and Isolatng Attachments,
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 several tests to which they submit
ted resist for the action OF those atmospheric
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 Smith,
Of this city, the plan of Mr. Sprat appear 10 to be
very well devised and In point Of mechanical construction
the best have
Ii be hoped that the of these Rods may become
general important auxiliary defence against danger
which must be regarded Of ordinary magnitude
which all buildings are liable. X. sILIMAN, Jr,
Prof Of Chem. Ia the University Of Louisville.
LOUISVILLE, January q, 1851.
All orders left ANDREW DUFFYS Stove Mandatory
eth street, will be promptly attended to; at GEohGE
BELLS, Alexandria, Va Of King and St. Asaph
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