Daily American telegraph., 1852-08-11
Protection from Liehtnina.

TINE undersigned being the duly appointed Agent or
NeRoD MANDATORY Covngton, Kentucky, begs to offer
these superior Rods Of sprawied carbonzed Anneaied
Iron with Zinc Protectors and Electro positive elements
combined in their manufacture thus rendering them equal
to copper as conductors They In eneet lengths with
style Of metallic patented attachments for brick
frame buildings also, glass isoaters of novel and inge
NOUS construction, paiented) forming lock- the whole
mounted with solid platinum silver point patented)
twelve inches long, surrounded at the base with three angu
lar negative magnets which possess the power TO an extra
ordinary extent dchargng the opposite elements OF the
fearful Thunderstorm and embrace the entire perc
ton OF science up TO the present me the whole constitu
ting the most magnificent anu perfect silent conductor ever
presented to the public.
Safety has not been compromised by aordng these ex
ceent rods ut such rates the greatest attention has
been given to so as to be readily attached
The astonishing power OF the negative magnets IN dschar
ing the air of Its opposite elements has been clearly
straed by the Eectromeer, 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
tent you hereby cautioned against laying yourselves
liable by purchasing of those who not authorized or
who substituting inferior limitations All agents duly
appointed can show their certificates Have good rods or
none. CHARLES w. HEfDoN,
Washington City
chemical reagents spratts Points Lightning
Rods and that the results these experiments convince
that they will resist the action of atmospheric causes and
thereby preserve the extremity shara condition most
senal to protection against lightning The reagents used
dum Common salt acetic acid suphurc acid and hydro
chloric acid. With the FIRST there action the
metal with the several acids, there was very Sga fact
sufficient to show that atmospheric influences would have
sensible effect.
JOHN LEcoNTE, Prof of Nat. Phil. ct Chem.
UNIVERSITY OF GA3 October 8, 1850
The Lightning Conductors of Mr.. sprat offered to me-
well calculated to perform the office for which they
intended. Yours, truly, Prof ROBT. PETER.
LEXINGTON, KY, February 20, 1860.
CHICAGO, September 8, 1850.
This may certify that have examined somewhat erit
cally james Spratts Patent Lightning Rods and that am
combining durability, cheapness, and efficacy, deem 1t
equal and think SUPERIOR to any other rod ever offered
for my inspection. Prof JAS v. n BLANEY.
AUGUSTA, (GA.) November H. 1850.
This will certify that have examined the Lightning
Rods Metallic Points, and Isolatng Attachments, manu-
featured by Mr. Spra 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 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
The Lightning Conductors put up by Mr. Henry NJ Smith,
of this city, the plan of Mr. Spratt appear to to be
very well devised and in point of mechanical construction
are the best have
Is to 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 DUFFY'S Stove Mandatory
7h street, will be promptly attended to; at GEORGE
BELLS, Alexandria, Va of King and ST. Asaph ss
lift