Daily American telegraph. [volume] (Washington [D.C.]) 1851-1852, 1852-08-27
Protection from Lightning.

TNHE undersigned being the duly appointed Agent Of
NNGRoD MANUPAcroRY Covngton Kentucky, begs to offer
these superior Rods of Carbonzed Anneaed
Iron with Zinc Protectors and Electroposve elements
combined manufacture thus rendering them equal
to copper conductors They in tcneet lengths with
new style Of metallic patented atachmsns for brick or
frame buildings also, glass isolaters Of novel and ing
NOUS construction (pstented forming lock- the whole
twelve inches long, at the base with three anu
lar negative magnets which the power to an extra
ordinary extent dschargng the opposite elements Of the
fearful Thunderstorm and embrace the entire perfc
ton of science up to the present time the whole constu
ting the most magnificent and perfect silent conductor ever
presented to the public.
Safety has not been compromised by aordng these ex
ceen rods at such low rates the greatest attention has
given their construction be readily attached
The astonishing power of the negative magnets in dscharg
srated by the Eiectrometer when unmagnetzed points
have shown but slight results though placed under the
electricity from the atmosphere when you would scarcely
suspect any being present
These being secured by double letters pa
tent you hereby cautioned against laying yourselves
table, by purchasing of those who not authorized
who are substituting inferior limitations All agents duly
appointed show their certificates Have good rods
none. CHARLES W. HEYD0N,
Washington City.
do hereby certify that have app he'd various powerful
chemical reagents to spratts Patent Points for Lightning
that they will resist the action of atmospheric and
thereby preserve the extremity sharpa condition NEST es
in the above experiments were non chloride Of
dum common salt acetc acid suphuric acid and hydro
chlorc acid With the first, there action the
METAL with the several acids there very sgha fact
sufficient to show that atmospheric influences would have
sensible effect.
JoHNLEcoNTE, Prof of Nat. Phil. ct Chem.
UNIVERSITY OF GA, October s, 1850.
The Lightning Conductors of Mr. spratt offered to me,
intended. Yours truly, Prof R0BT. PETER
LEXINGTON, KY, February 20, 1850
CHICAGO, September 8, 1850.
This may certify that have examined, somewhat crit
cay, James Spratts Patent Lightning Rods and that
Of opinion that II Is constructed scientific principles For
combining durability, cheapness, and efficacy deem t
equal and think SUPERIOR any other rod offered
for my inspection Prof JAS. V. 2. BLANEY.
AUGUSTA, (GA) November ii, 1850.
This will certify that have examined the Lightning
Rods, Metallic Points, and Isolating Attachments,
featured by Mr. Spra and regard them constructed in
conformity 10 the general laws of the electric uid and the
metallic compound constituting the Points, promising,
from the result of several tests to which they submit
ted to resist for years the action Of those atmospheric causes
most likely 10 oorrode 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. sprat appear to to be
very well devised and in point Of mechanical construction,
the best have
1t is to be hoped that the use Of these may
which must DO regarded Of ordinary magnitude, TO
which all buildings are liable. II. 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- or at GEORGE
BELLS, Alexandria, ya Of King and st. Asaph sts
ap14-u