Daily American telegraph., 1852-06-03
Protection from LIGHTNING.

JNHE UNDERSIGNED being the duly appointed Agent Of
sPRATTs ELEcrmoAS AND ELECTRO h =, %
these superior Rods Of Sprawisted, CarDozed Anheaea
Iron with Zinc Protectors and Eectroposiuve elements
combined in their manufacture thus rendering them
to copper conductors They in teneet lengths with
fitted brasscrew connecting joints an entire
new style OF metallic patented attachments for brick or
frame buildings; also glass isoaterS of novel and nge
NOUS construction, atented forming lock; the whole
mounted with solid platinum silver point, lpatented)
twelve inches long, at the base with angu
lar negative magnets which possess power extra
most fearful thunderstorm embrace the entire perec
ton of science up to the present times the whole consu-
ting the most magnificent and perfect silent conductor
presented to the public
Safety has not been compromised by aordng these ex
ceent rods at such low rates the greatest attention has
given to their to be readily attached
The astonishing OF the negative magnets In dscharg
ing the air Of Its opposite has been clearly demon
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
These being by double letters pa
tent you hereby cautioned against laying yourselves
table, by purchasing of those who not authorized
who substituting inferior limitations. All agents duly
none. CHARLES W. HEYDoN
Washington City
do hereby certify that have app lied various powerful
chemical reagents to spras Patent Points Lightning
Rods and that the results of these experiments convince mo
that they will resist the action of atmospheric causes and
thereby preserve the extremity sharpa condition most
sena to protection against lightning The used
dium common salt acec 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
sensible effect. t-a
JOHN LECoNTE, Prof of Nat. Phil. ct Chem.
UNIVERSITY or GA. October s, 1850
The Lightning Conductors of Mr. spratt offered to me-
well calculated to perform the office for which they
intended. Yours, truly, Prof ROBT. PETER.
LEXINGTON, KY, February 20, 1850.
CHICAGO, September 3, 1850.
This may certify that have examined somewhat Grt
combining durability, chcapness and efficacy, deem it
equal and think SUPERIOR to any other rod over offered
for my inspection. Prof JAS Y. q. BLANEY.
AUGUSTA, (GA.) November H. 1850.
This will certify that have examined the Lightning
Rods Metallic Points, and Isolang Attachments, manu-
featured by Mr. Spra and regard them constructed III
conformity the 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. ,g 4. ~
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
the best have
1t is be hoped that the of these Rods may 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 DUFFYS Stove Mandatory,
It'll street, will be promptly attended to; at GEORGE
BELLS Alexandria, Va corner of King and st. Asaph SITS