Daily American telegraph., 1852-04-29
Protection from Lightning.

INHE undersigned being the duly appointed Agent OF
il SPRATrs EtEeTRcAN AND ELECTRO LiGnT-
these superior Rods Of Spiral twisted Carbonzed Anneaed
Iron with Zinc Protectors and Retrospective elements
combined i'm their manufacturer thus rendering them equal
copper conductors They in tenfeet lengths with
accurately brass connecting joints an entire
style Of metallic (aented) attachments brick or
budings also, glass solaers, of novel and inge
Nous construction (natened0 forming lock- the whole
mounted with solid platinum silver point (patented)
twelve inches long, surrounded at the base with three
lar negative magnets which possess the power an extra
extent OF aschargg the opposite elements OF the
most fearful thunderstorm and embrace the entire perec
ton Of science up to the present me the whole const
ng the most magnificent and perfect silent conductor ever
presented 10 tho public.
Safety has not been compromised by aordng these
ceent rods at such low rates. the greatest attention has
been given to their construction be readily attached
The astonishing power Of the negative magnets in dschar
ing the air Of its opposite elements has been clearly demon
straed by the Eectrometer 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 being secured by double letters pa
tent YOU are hereby cautioned against laying yourselves
liable by purchasnS of those who are not authorized ar
who arc substituting inferior limitations All agents duly
appointed can show their certificates Have good rods
none. CHARLES w. HEYD0N,
Washington City.
do hereby certify that have app lied various powerful
chemical reagents spras Patent Points for Lightning
Rods and that the results Of these experiments
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
III OF cnlorlue OF
dum Common acetic acid sulphurc acid and hydro
chloric acid. With the FIRST there action the
metal with the several acids, there very sga fact
sufficient to show that atmospheric influences would have
sensible effect.
JOHN LECoNTE. Prof Of Nat. Phil. ct Chem.
UNIVERSITY OF GA, October 5, 1850
The Lightning Conductors of Mr.. Spra offered to NO.
are well cacuatedto perform the Office for which they
intended Yours truly, Prof ROBT. PETER.
LEXINGTON Kf., February 20, 1850.
CHICAGO, September 3, 1850.
cay, James Spratts Patent Lightning Rods, and that
Of opinion that it Is constructed scientific principles For
combining durability cheapncss, and efficacy, deem it
equal and think SUPERIOR to any other rod ever offered
for my inspection. Prof JAS v. 2. BLANEY.
AUGUSTA, (GA.) November H. 1850.
This will certify that have examined the Lightning
Rods, Metallic Points, and Isolating Attachments,
featured by Mr. Sprat and regard them constructed in
conformity to the general laws of the electric fluid and the
from the result of several to which they submit
ted to resist for years the action of those atmospheric
most likely to corrode them. A. MEANS,
Prof Phys &c., Emory College, Ca and Prof Chem and
Pharm, Medical College, Ca
The Lightning Conductors put up by Mr. Henry NJ. Smith,
of this city, the plan Of Mr. Sprat appear to to be
very well devsed and in point of mechanical construction
are the best have seen
1t is to be hoped that the these Rods may become
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 q, 1851.
All orders left at ANDREW DUFFY'S Stove Mandatory
It'll street, will be promptly attended to- at GEORGE
BELLS Alexandria, Va, Of King and ST. Asaph
ap lift