Daily American telegraph., 1852-05-17
Protection from Lightning.

NEE undersigned being the duly appointed Agent OF
SPRATTs ELECTRICIAN ELECTRO MErALLuhdisf LIGHT
NINaRoD MANUFAcToRY Coyngon, Kentucky begs To oner
these superior Rods Of CarbonIeo Anneaed
combined In their thus rendering them equal
copper conductors They are IN teneet lehgth WIN
accurateyhtted connecting JOINTS an entire
new STYLE Of metallic patented) attachments, for brick
frame buildings also glass solaers OF novel and inge
NOUS construction patened0 forming lock; the whole
mounted with solid platinum silver point, patented
twelve long surrounded at the base with three
lar negative magnets which possess the power TO an extra
ordinary extent Of dschargg the opposite elements the
most fearful thunderstorm, and embrace the entire perfc
ton of science up the present time the whole cons.
ting the most magnificent and perfect silent conductor
presented TO the public.
safety has not been compromised by affording these
ceent rods at such low rates; the greatest attention has
been given TO their so 10 readily attached
The astonishing power Of the negative magnets in dscharg
ing the AIR OF Its opposite elements, has been clearly demon
straed by the Eectrometer, when unmagnetzcd points
have shown but slight results though placed under the
same 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
tent you are hereby cautioned against laying yourselves
liable, by purchasing Of those who not authorized or
who are substituting interior limitations All agents auy
appointed can show their certificates Have good rods or
none CHARLES W HEIDI
Washington City.
do hereby certify that app lied various powerful
chemical reagents to Spratts Patent Points for Lightning
Rods that the results of these experiments convince me
that they will resist the action of atmospheric causes and
thereby preserve the extremity sarpa condition most
sentia protection against lightning The reagents used
In the experiments solution Of chloride Of
dunn common salt acetc acid sulphurc acid and hydro
chloric acid. With the first, there action the
metal; with the several acids, there very sg-a fact
sufficient to show that atmospheric influences would have
no sensible effect.
JOHN LECoNTE. Prof Of Nat. Phil. ct Chem.
UNIVERSITY OF GA, October 3, 1850.
The Lightning Conductors Mr.. spratt offered to me
well calculated 10 perform the office for which they
intended Yours, truly, Prof ROBT. PETER.
LEXINGTON, KY, February 20, 1850.
CHICAGO, September g. 1850.
This may certify that have examined somewhat cr-
cay James Spratts Patent Lightning Rods and that
Of opinion that II is constructed scientific principles For
combining durability, cheapness, and efficacy deem 1t
equal and think superior, to any other rod offered
for my inspection. Prof JAS. " u. BLANEY.
AUGUSTA, (GA) November IL, 1850
This will certify that have examined the Lightning
Rods Metallic Points, and Isolatng Attachments
conformity to the general laws of the electric fluid and the
metallic compound constituting the Points promising
from the result of several tests to which they submit
ted to 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 NJ Smith,
Of this city the plan of Mr. Spra appear to to be
very well devised and In point of mechanical construction
the best l have
1t is be hoped that the these Rods may become
which must be regarded of no ordinary magnitude, to
which all buildings are liable. r. SILIMAN, Jr.
Prof of Chem. in the University Of Louisville
LOUISVILLE, January II, 1851
All orders left at ANDREW DUFFYS Stove Mandatory
7th street, will be promptly attended to- at GEORGE
BELLS Alexandria, Va of King and St. Asaph
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