Daily American telegraph. [volume] (Washington [D.C.]) 1851-1852, 1852-10-06
Protection from Lightning.

TNHE undersigned, being the duly appointed Agent OF
SPRATTS ELECTRICIAN ELECTRO METALLURGIST LIGHT
ROD MANurAoToRr, Covington Kentucky begs to offer
these superior Rods Carbozed Annealed
Iron with Zinc Protectors, and Eectropostve elements
combined in their manufacturer thus rendering them equal
copper conductors They in tenee lengths with
style OF metallic patented attachments for brick
frame buildings ALSO glass solaters Of novel and nge
mounted with solid platinum silver point patsnted)
twelve inches long, at the base with three ang
ordinary extent dschargng the opposite elements the
most fearful thunderstorm, and embrace the entire per
ting the most magnificent and perfect silent ever
presented to the public.
Safety been compromised by aording these ex.
cslent rods at such low rates; the greatest attention has
been given to their construction, be readily attached
The astonishing power of the In dscharg
ing the of its opposite elements has been clearly demon
strated by the Eectrometer when unmagnetsed points
%
electricity from the atmosphere when you would scarcely
These being secured by double letters pa.
tent hereby cautioned against laying yourselves
liable BY purchasing Of those who are not authorised or
none. CHARLES w. HEYD0N,
~ Washington OFT,
do hereby certify that have app lied various POI
chemical reagents to Spratts Patent Points for Lght
Rods that the results Of these experiments convince
that they will resist the action of atmospheric causes
sental protection against lightning The reagents
In the above experiments solution Of chloride of
chloric acid With the first, there action the
metal with the acids there very slgha fact
sufficient show that atmospheric influences would have
sensible effect.
JOHN LECoNTE, Prof Of Nat. Phil. ct Chem.
UNIVERSITY OF Ga, October 8, 1850. ~
The Lightning Conductors Of Mr. Spratt offered 10 me,
well calculated to perform the Office for which they
intended Yours truly, Prof. RoBT. PETER.
LEXINGTON, Ky, February 20, 1885, ~
CHICAGO September Q, 1851
This may certify that have examined somewhat criti
caly James Spratts Patent Lightning Rods and that
of opinion that 1t Is constructed scientific principles For
combining durability, cheapness and efficacy, deem IL
equal and think SUPERIOR to any other rod offered
for my inspection Prof JAS. " 2. BLANEY.
AUGUSTA, (GA) November IL, 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 fud the
metallic compound constituting the Points, promising
from the result Of several tests to which they submit
ted 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. sJ..
The Lightning Conductors put up by Mr. Henry Smith,
of this city, the plan Of Mr. sprat appear to be
very we'll devised and, in point Of mechanical construction,
are the best have ever seen. IwN It
It IL to be hoped that the use may become
which must be regarded OF ordinary magnitude
which all buildings are liable. r. SILIMAN, Jr,
Prof Of Chem. in the University Of Louisville.
LouIsvIILE, January n, 1851.
All orders left at ANDREW DUFFYs Stove Mandatory
9TH street, will be promptly attended to; or at GEORGE
BELLS Alexandria, Va corner Of King and st. Asaph ss
an l4-H