Daily American telegraph., 1852-06-23
Protection from Lightning.

THE undersigned being the duly appointed Agent OF
NNGRop MANUFAoroRf Ooyington Kentucky begs to offer
THESE superior Rods, of Spirawsted CarDonled
combined in their manuacture; thus rendering them equal
70 copper as conductors They in teneet lengths with
new style Of metallic atented attachments for brick
frame buildings also, glass solaers of novel and inge
mounted with solid platinum silver point (patented
twelve inches long, surrounded with three
lar negative magnets which possess the to an extra
ordinary extent dschagng the opposite elements Of the
most fearful Thunderstorm and embrace the entire perc
ting the most magnificent and perfect silent ever
presented to the public @H
Safety has not been compromised by aordine these ex
ceent such low rates the greatest attention has
given to their so as to be readily attached
The astonishing OF the negative in dscharg
ing the air its opposite elements has been clearly
straed 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 mproy being secured by double letters
eut you hereby cautioned against laying yourselves
LIABLE by purchasing Of those who are not authorized or
appointed show their certificates Have good rods or
none. CHARLES w. HEYDON,
Washington City.
do hereby certify that have app lied various powerful
chemical reagents to sprats 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 sharpa condition most
sentia protection against lightning The reagents used
in the above experiments solution of chloride
dunn common sa acec acid suphuric acid, and hydro
choric acid. With the first, there action the
METAL with the several acids, there very sgha fact
sufficient to show that atmospheric influences would have
no sensible effect
JOHN LECoNTE, Prof of Nat Phil. ct Chem
UNIVERSITY OF Ga, October g. 1850.
The Lightning Conductors of Mr. spratt, offered to me-
intended. Yours, truly, Prof R0BT. PETER.
LEXINGTON, KY, February 20, 1850
CafCAGo September 3, 1850.
This may certify that have examined somewhat crit
cay, Sprats Patent Lightning Rods and that
of opinion that is constructed scientific principles For
combining durability, cheapness, and efficacy, deem it
equal and think superior, to other rod ever offered
for my inspection Prof JAS. V, y, BLANEY.
AUGUSTA, (GA) November IL, 1850.
This will certify that have examined the Lightning
Rods, Metallic Points, and Isoating Attachments, manu-
featured by Mr. Sprat and regard them constructed in
conformity the general of the electric fluid and the
metallic compound constituting the Points as promising
from the result Of several tests which they submit
ted resist 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, Ga.
The Lightning Conductors put up by Mr.. Henry NJ Smith,
Of this city, the plan of Mr. Spra appear to me to be
very 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 II. SILIMAN, Jr.,
Prof of Chem. in the University of Louisville
| LOUISVILLE, January q, 1851.
All orders left at ANDREW DUFFYs Stove Mandatory,
It'll street, will be promptly attended to- at GEORGE
BELLS Alexandria, Va of King and ST. Asaph SITS
lift