Daily American telegraph., 1852-07-01
Protection from Lightning.

sHE undersigned, being the duly appointed Agent OF
y EtEcfRIcAE AND ELECTRO @ !, @
these superior Rods of Spawsted Carbonized Anneaed
with ZINC Protectors and ElectroPostve elements
IN their manufacturer thus rendering them equsl
They are in teneet lengths with
brass screw connecting joints entire
new o metallic patened attachments, for brick or
frame buildings also, glass isolaters, novel and inge
NOUS construction patented0 forming lock the whole
mounted Witn solid platinum silver point, (patented
twelve inches long, surrounded the base with three angu
lar negative magnets which possess the power extra
ordinary extent OF dschargng the opposite Of
most fearful Thunderstorm and embrace the entire perfec
ton Of science up TO the present me the whole oonst
ting the most magnificent and perfect silent conductor ever
presented TO the public, @ NsH@
Safety has not been compromised by aordng these ex
ceen rods such low rates the greatest attention has
been given their construction 80 as TO be readily attached
The astonishing power of the negative magnets in dcharg
ing the air of Its opposite elements has been clearly demon
strated by the Eectrometer when unmagnetzed 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 improvements being secured by double letters pa
tent you hereby cautioned against laying yourselves
liable by purchasing Of those who not authorized or
appointed show their certificates Have good rods or
none. 5..@ s.# CHARLES w, HEYDoN,
Washington City.
do hereby certify that have app He'd various powerful
chemical reagents to spratts Patent Points for Lightning
Rods and that the results of these experiments convince
that they will resist the action of atmospheric causes and
thereby preserve the extremity SHARPE condition most
senta to protection against lightning The reagents used
in the above experiments solution Of chloride of
dum common salt) acetic acid suphuric acid and hydro
chlorc acid With the first, there action the
meta with the several acids there very sgha fact
sufficient show that atmospheric influences would have
JOHN LECoNTE, Prof. of Nat Phil etChem
UNIVERSITY OF Ga, October 8, 1850
The Lightning Conductors of Mr.. spratt offered to me-
well calculated to perform the Office Tor po Which hsy are
| LEXINGTON, KY, February 20, 1850,
CHICAGO, September g. 1850
This may certify that have examined, somewhat crit
cally James spratts Patent Lightning Rods and that am
of opinion that is constructed scientific principles For
combining durability, cheapness, and efficacy, deem
equal and think superior to other rod ever offered
for my inspection. Prof JAS. v. 2. BLANEY.
| AUGUSTA, (GA.) November IL 1850.
This will certify that have examined the Lightning
Rods Metallic Points, and Isolatng Attachments, manu-
featured by Mr. Sprat and regard them constructed III
conformity the general laws of the electric fluid and the
metallic compound constituting the Points promising
from result several tests to which they submit
to 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, Ca
The Lightning Conductors put up by Mr. Henry Smith
of this CITY, the plan Of Mr. Sprat appear to to be
very well DEVISED and in point of mechanical construction
| are the best have
1t to 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. R. SILIMAN, Jr.,
Prof of Chem in the University of Louisville.
LOUISVILLE January 27, 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 SITS
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