Daily American telegraph., 1852-07-21
Protection from lightning.

HE undersigned, being the duly appointed Agent OF
NaoD MANuYAcroRY Coyngton, Kentucky, begs to offer
these superior Rods of Carbonized Annealed
IRON with Zinc Protec9rs ana ars
TO copper conductors They In eneet lengths WIN
accurately fitted brassscrew connecting joints an entre
style of metallic patented attachments for brick or
frame buildngs also, glass isoaters OF novel and nge
NOUS construction (patented forming lock- the whole
mounted with solid platinum silver point (patented)
twelve inches long at with three ang
lar negative magnets which possess the power TO an extra
ordinary extent of dcharng the opposite elements Of the
most fearful thunderstorm and embrace the entire perec
ton of science up to the present times the whole consttu
ting the most magnificent and perfect silent conductor ever
presented to the public. Efs
Safety has not been compromised by aording these
ceen such low rates the greatest attention has
been given to their construction be readily attached
The astonishing power of the negative magnets in dscharg
ing the air of its opposite elements has been clearly demon
strated by the Eectrometer, when unmagnetzed pons
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
These improvements being secured by double letters pa
tent hereby cautioned against laying yourselves
who are substituting inferior limitations All agents duly
appointed can show their certificates Lave good rods or
none. CHARLES w. HEYDON,
Washington City.
do hereby certify that have app lied various powerful
chemical reagents Spratts Patent Points Lightning
Rods and that the results these experiments convince
that they will resist the action of atmospheric causes and
thereby the extremity harpa condition most
senia protection against lightning The reagents used
in the above experiments solution of chloride of
dum common SALT acetc acid sulphurc acid and hydro
chlorc acid With the frst there action the
metal with the several acids there very sga fact
sufficient to show that atmospheric influences would have
no sensible effect.
JOHN LEcoNTE, Prof of Nat Phil. ct Chem.
UNIVERSITY OF GA, October 8, 1850
The Lightning Conductors of Mr.. sprat offered to me-
are well calculated to perform the Office for which they
intended Yours, truly, Prof ROBT. PETER.
LEXINGTON, KY, February 20, 1850.
CHICAGO, September g. 1850.
This may certify that have examined, somewhat crti
cay, James Spratts Patent Lightning Rods and that am
of opinion that it is constructed scientific principles For
combining durability cheapness, and efficacy, deem 1t
equal and think SUPERIOR to any other rod ever offered
for my inspection. Prof JAS. v. z. BLANEY.
AUGUSTA, (GA.) November H. 1850.
This will certify that have examined the Lightning
Rods Metallic Points and Isolating Attachments, manu-
facured by Mr. Sprat and regard them constructed in
conformity to the general laws of the electric ud 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
most likely to corrode them. A. MEANS,
Prof Phys. &c. Emory College, Ga and Prof Chem aud
Pharm, Medical College, Ga.
of this city, the plan of Mr. Spra appear to to be
very well deysed and in point of mechanical construction
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 r. 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 s
an 14-H