Daily American telegraph. [volume] (Washington [D.C.]) 1851-1852, 1852-07-31
Protection from lightning.

FCHE undersigned being the duly appointed Agent Of
SaRoD MANURAcroRY Coyngton, Kentucky, begs TO offer
these superior Rods OF sprawisted Carbonized Anneaed
Iron with Zinc Protectors and Eectroposiuye elements
combined their manufacture; rendering them equal
copper as conductors They In teneet lengths with
new style of metallic (patente attachments for brick
frame budings also, glass isoaters, Of novel and inge
NOUS construction, patented forming lock; the whole
mounted with solid platinum silver point, (patenedO
twelve inches long, surrounded at the base with three angu
lar negative magnets which possess the power to an extra
fearful thunderstorm, and embrace the entire perfec
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
ceent rods such low rates the greatest attention has
given their constructions as to be readily attached
The astonishing power OF the magnets IN discharg
Ing the air OF Its opposite elements mas been 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 secured by double letters
tent you are hereby cautioned against laying yourselves
LIABLE by purchasing of those who not authorized or
who substituting inferior limitations. All agents duly
none. CHARLES W. HEYDoN,
Washington City.
chemical reagents to sprats Points for Lightning
Rods and that the results these experiments convince me
that they will resist the action of atmospheric causes and
thereby preserve the extremity sharp-a condition most
sental protection against lightning The used
dunn common sal acetc acid sulphurc acid and hydro
choric 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
no sensible effect.
JOHN LEcoNTE, Prof of Nat. Phil. ct Chem.
UNIVERSITY OF Ga. October 8, 1850.
The Lightning Conductors of Mr. Spratt offered to me-
well calculated to perform the office for which they
intended. Yours, truly Prof R0BT. PETER.
LEXINGTON, KYy February 20, 1850.
CHICAGO, September 3, 1850.
This may certify that have examined somewhat crt
cay James sprats Patent Lightning Rods, and that am
Of opinion that is constructed scientific principles For
combining durability, cheapness and efficacy, deem It
equal and think SUPERIOR to any other rod ever offered
for my inspection. Prof JAS. V. q. 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 the general laws Of the electric fluid and the
metallic compound constituting the Points, as promising
from the result of several tests to which they submit
ted 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 Smith,
Of this city, the plan of Mr. Spratt appear to me to be
well DEVISED and In point of mechanical construction
are the best have ever
Is to be hoped that the of these Rods may become
general important auxiliary defence against danger
which must be regarded of no ordinary magnitude to
which all buildings are liable. II. sILIMAN, Jr,
Prof of Chem. in the University Of Louisville.
LOUISVILLE, January u, 1851
All orders left ut ANDREW DUFFYS Stove Mandatory
7th street, will be promptly attended to- or at GEORGE
BELLS Alexandria, Va corner OF King and st. Asaph ss
ap 14-tf