Daily American telegraph., 1852-07-12
Protection from Lightning.

NHE undersigned being the duly appointed Agent Of
MANuPAoroRr Coyngton Kentucky, begs to offer
these superior Rods Spiral twisted Carbonized Annealed
IRON with Zinc Protectors and Electroposinye elements
combined In their manufacturer thus rendering them equs
TO copper conductors They In enet lengths with
accurately brassscrew connecting joints entire
style Of metallic (patented attachments for brick or
frame buildings also glass isoaters Of novel and inge
NOUS construction paented) forming lock- the whole
twelve inches long, surrounded at the base with three an
lar negative magnets which the power to extra
ordinary extent of dischargng the opposite elements of the
most fearful Thunderstorm, and embrace the entire perec
ton of science to the present times the whole consu
ting the magnificent and perfect silent conductor
presented to the public.
Safety has not been compromised by aording these
ceent rods such low rates. the greatest attention has
been given to their construction TO be readily attached
The astonishing power of the negative magnets In discharg
ing the air Of Its opposite elements has been clearly demon
strated by the Eectrometer when unmagnetzed points
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 are not or
appointed can show their certificates Have good rods or
none. CHARLES W. HEiDON,
Washington City.
do hereby certify that have app lied various powerful
Rods and that the results these experiments convince
that they will resist the action of atmospheric and
thereby the extremity sharpa condition most es
in the above experiments solution Of chloride of 90
dium common sa acetc acid suphuric acid and hydro
choric acid With the first, there action the
metal with the several acids there very sgha fact
sufficient to show that atmospheric influences would have
no sensible effect
JOHN LEcoNTE, Prof. of Nat Phil ct Chem
UNIVERSITY OF Ga, October s, 1850.
The Lightning Conductors of Mr.. spratt offered to me-
well calculated to perform the office for which they
intended. Yours truly, Prof ROBT PETER.
LEXINGTON, Ky, February 20, 1850.
CHICAGO, September 81 1850.
This may certify that have examined, somewhat crt
cay James Spratts Patent Lightning Rods and that
of opinion that is constructed scientific principles For
combining durability, cheapness, and efficacy deem
equal and think SUPERIOR to any other rod ever offered
for my inspection Prof JAS. v. u BLANEY.
AUGUSTA, (GA.) November IL 1850.
This will certify that have examined the Lightning
factured 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 tests 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.
this CITY, the plan of Mr. Sprat appear to 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 are liable. II. SILIMAN, Jr.,
Prof of Chem. in the University of Louisville.
LOUISVILLE January q, 1851
All orders left at ANDREW DUFFYs Stove Mandatory
BELLS Alexandria, Va of King and St. Asaph sts
lift