Daily American telegraph., 1852-05-11
Protection from Lightning.

NHE undersigned being the duly appointed Agent OF
SPRATTs ELECTRICIAN ELECTRO METALLURGIsT LIGHT
NdRoD MANuFAcToRr Covngton, Kentucky, begs to offer
these superior Rods Of spratwised Carbonzed Anneaed
lron with Zinc Protectors and Electroposive elements
combined in their manufacturer thus rendering them equal
copper conductors They in feet lengths with
accurately fitted connecting joints entire
style of metallic (patented attachments for brick or
frame buldngs ALSO glass isoaters, Of novel and nge-
nious construction, (patented) forming lock- the whole
mounted with solid platinum silver point patented)
twelve inches long, surrounded at the with three
lar negative magnets which the power to an extra
ordinary extent Of the opposite elements Of the
most fearful thunderstorm and embrace the entire perc
ton Of science up to the present me the whole consttu-
ting the most magnificent and perfect silent conductor
presented to the public.
Safety been compromised by aording these ex-
ceent rods at such low rates the greatest attention has
been given their to be readily attached
The astonishing power Of the negative magnets dschag
the air OF Its opposite elements has been clearly demon
by the Eleorometer when unmagnetzed 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 pa
tent you hereby cautioned against laying yourselves
LIABLE by purchasing of those who not authorized
who are substituting inferior limitations All agents duly
none CHAKLES w. HEfDON,
Washington City
do hereby certify that app lied various powerful
chemical reagents to spratts Patent Points for Lightning
Rods and that the results of these experiments convince
that they will resist the action of atmospheric causes and
thereby preserve the extremity sharpa condition most es
sental protection against lightning The reagents
the above experiments solution Of chloride
dium common sat acetc acid suphuric acid and hydro
choric acid. With the first, there action the
metal with the several acids there very gha fact
sufficient to 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 to me,
are well calculated perform the office for which they
intended Yours, truly, Prof ROBT. PETER.
LEXINGTON, KY, February 20, 1880
CHICAGO, September 3, 1850
This may certify that have examined somewhat criti-
caly James Spratts Patent Lightning Rods, and that
of opinion that it is constructed scientific principles For
combining durability, cheapness and efficacy, deem it
equal and think SUPERIOR to any other rod offered
for my inspection. Prof JAS. v. z. BLANEY.
AUGUSTA, (GA.) November IL, 1850.
This will certify that have examined the Lightning
Rods, Metallic Points, and Isolang Attachments,
featured by Mr. Sprat and regard them constructed in
conformity to the general laws of the electric fluid the
from result several tests to which they submit
ted to resist for the action of those atmospheric
most likely to corrode them. A. MEANS,
Prof Phys Sc, 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 be
very well DEVISED and in point of mechanical construction
are the best have
1t is to be hoped that the of these Rods become
general important auxiliary defence against danger
which must be regarded Of ordinary magnitude to
which all buildings liable. II. SILIMAN, Jr,
Prof of Chem. in the University of Louisville.
LOUISVILLE January n, 1851
All orders left ANDREW DUFFYS Stove Mandatory
7th street. will be promptly attended to; at GEORGE
BELLS Alexandria, Va of King and St. Asaph sts
ap 4-tf