Daily American telegraph., 1852-08-18
Protection from Lightning.

NE undersigned, being the duly appointed Agent OF
SPRATTs ELECTRICIAN AND ELECTRO METAILuRGIsT LIGHT
SGRoD MANURAoToRY, Coyington Kentucky begs offer
these superior Rods Of Carbonized Annealed
iron with Zinc Protectors and ElecroposVe elements
combined In their manufacturer thus rendering them equal
to copper conductors They in eneet lengths with
accurateytted competing joints an entire
style Of metallic patsnea attachments for brick or
frame buidings also, glass solater of novel and inge
mounted with solid platinum silver point (patented)
twelve inches long, at tho base with three angu
lar negative masns which possess the power to an extra
most fearful Thunderstorm and embrace the entire perc
ton Of science up 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 aording these
cent rods at such low rates. the greatest attention has
been given to their construction be readily attached
The astonishing of the negative dscharg
srated by the Elsctromeer, when unmagnetiaed points
have shown but slight results though placed under the
electricity from the atmosphere when would scarcely
suspect any being present.
tent you are hereby cautioned against laying yourselves
iable by purchasing Of those who not authorized
who are substituting Inferior limitations All agents duly
none. CHARLES W. HEYDoN,
Washington City,
do hereby certify that have app lied various powerful
chemical reagents to prats Patent Points for Lightning
Rods that the results experiments convince
that they will resist the action Of atmospheric and
thereby preserve the extremity sharpa condition most
sental protection against lightning The reagents used
above experiments were solution chloride Of
dium Common acetc acid sulphurc acid and hydro
choric acid. With the first there action the
metal; with the several acids there very sga fact
sufficient to 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.. Sprat offered to me-
are well calculated to perform the Office for which they are
LEXINGTON, KY, February 20, 1850.
CHICAGO, September 8, 1850.
This may certify that have examined, somewhat crt
lat m
of opinion that Is constructed scientific principles For
combining durability, cheapness and efficacy, deem it
equal and think SUPERIOR to any other rod offered
for my inspection. Prof JAS v. Z:pLANEY.
AUGUSTA, (GA.) November H. 1850.
This will certify that have examined the Lightning
Rods Metallic Points, and 1soating Attachments
actured by Mr. Spat and regard them constructed in
conformity to the general laws Of the electric fluid and the
metallic compound constituting the Points, promising
from the result of several which they submit
ed to resist for years 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 M. Smith,
of this city, the plan of Mr. Spra appear to to be
well devised and in point of mechanical construction
are the best have
1t is to 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 r. SILIMAN, Jr.,
Prof of Chem. in the University of Louisville.
LOUISVILLE, January q, 1851.
All orders left at ANDREW DUFFY's Stove Mandatory
BELLS Alexandria, Va of King and st. Asaph sts
l4-n