Daily American telegraph., 1852-07-23
Protection from lightning.

rINHE undersigned, being the duly appointed Agent Of
SPRATT's ELECTRICIAN ELECTRO METALLUR0IsT LIGHT
NEeRop MANDATORY Coyingon Kentucky begs to offer
these superior Rods Of Sprawsted Carbonzed Annealed
WIN u ne Protectors ana s as
copper as conductors They IN tenee lengths with
brass screw connecting joints, an entire
new style OF metallic paented attachments, Tor prcK OF
frame budingsj also, glass solaers Of novel and nge
NOUS construction lparened forming lock; the whole
mounted with solid platinum silver point, (patentedD
twelve inches long, the with three angu
lar negative magnets which possess the power to extra
most fearful Thunderstorm and embrace the entire perc
ton Of science TO the present times the whole consu
ting the most magnificent and perfect silent conductor
presented 10 the public.
Safety been compromised by afording these ex.
ceen rods ut such low rates. the greatest attention has
been given their construction be readily attached
The astonishing power Of the negative magnets n discharg
ing the air of s opposite elements has been clearly demon
strated by the EIecroneter when unmagnezed points
have shown but eight 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 pa
tent you hereby cautioned against laying yourselves
liable by purchasing of those who not authorized or
who substituting inferior limitations. All agents duly
appointed show their certificates Have good rods or
none CHARLES W. HEfDON,
Washington City.
do hereby certify that have app lied various powerful
chemical reagents 10 Sprats Patent 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 sharpa condition most
senal to protection against lightning The reagents used
In the above experiments solution of chloride Of
dum common sal acetic acid sulphurc acid and hydro
chloric 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 Phf. ct Chem.
UNIVERSITY or 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 ROBT. PETER.
LEXINGTON, Ky, February 20, 1850.
CHICAGO, September 3, 1850.
This may certify that have examined somewhat criti
cally James Sprstfs Patent lightning Rods and that am
opinion that IL is constructed scientific principles For
combining durability, cheapness and efficacy, deem u
equal and think SUPERIOR to any other rod ever offered
for my inspection. Prof JAS v. q. BLANEY.
AUGUSTA, (GA.) November IL, 1850.
This will certify that have examined the Lightning
Rods Metallic Points, ana Iolang Attachments,
featured by Mr. Sprat and regard them as constructed in
conformity to the general laws of the electric id and the
metallic compound constituting the Points, promising,
from the result several tests which they submit
ted resist for years the action of those atmospheric
most likely to corrode them. A. MEANS,
Prof Phys &c., Emory College, Ca, and Prof Chem and
Pharm. Medical College, Ga
of this city, the plan of Mr. spratt appear to
very well devsed and In point OF mechanical construction
are the best have seen.
1t B to be hoped that the of these Rods may become
general important auxiliary defence against danger
which must be regarded of ordinary magnitude to
which all buildings are liable. II. SILlMAN, Jr,
Prof OF Chem in the University OF Louisville.
LOUISVILLE, January q, 1851.
All orders left at ANDREW DUFFY's Stove Mandatory
BELLS, Alexandria, Va Of King and St. Asaph ss
an l1-tf