Daily American telegraph., 1852-08-28
Protection from Lightning.

V,HE undersigned, being the duly appointed Agent Of
NGRoD MANupAcToRr Covngton, Kentucky begs to offer
these superior Rods of ptwisted Carbonzed Annealcd
Iron with Zinc Protectors and Eectropositve elements
combined in their manufactured thus rendering them equal
copper conductors They In teneet lengths with
brassscrew connecting joints an entire
frame buldngs ALSO glass isoaters of novel and nge
NOUS construction, atented forming lock; the whole
mounted with solid platinum silver point (patented)
twelve inches long, surrounded at the base with three ang
lar negative magnets which possess the power to extra
fearful Thunderstorm and embrace the entire perec
ton of science up to the present me the whole oonstt
ting the most magnificent and perfect silent conductor
presented to the public.
Safety has compromised by aording these
ceent rods at such low rates. the greatest attention has
been given their construction be readily attached
The astonishing power of the negative In dschar
strated by the Eectrometer, when unmagnesed points
have shown but slight results though placed under the
same conditions In fact they gather and silently discharge
electricity from the atmosphere when you would scarcely
suspect any being present.
These Improvements being secured by double letters pa
tent are hereby cautioned against laying yourselves
table, by purchasing of those who not authorized
who substituting inferior limitations. All agents duly
none. = saw ~ CHARLES v. HEYDoS,
do hereby certify that have app lied various powerful
chemical reagents to spratts Patent Points for Lightning
and that the results of these experiments convince me
that they will the action of atmospheric causes and
thereby preserve the extremity harpa condition most
senta 10 protection against lightning The reagents used
in the above experiments were solution Of chloride Of so
dium, Common SALT acetic acid suphuric acid and hydro
chloric acid. With the first there action the
metal with the several acids there very sg-a fact
sufficient to show that atmospheric influences would have
sensible effect.
JOHN LEcoNTE, Prof of Nat Phil. Chem.
UNIVERSITY OF GA, October s, 1850.
The Lightning Conductors of Mr.. spratt offered to me-
are well calculated perform the Office for which they arc
LEXINGTON, KY, February 90 1850.
CHICAGO, September 8, 1850.
This may certify that have examined, somewhat crit
caly James Spratts Patent Lightning Rods and that
Of opinion that il is constructed scientific principles
combining durability, cheapness, and efficacy, deem II
equal and think SUPERIOR to any other rod offered
for my inspection. Prof JAS. V. Y. BLANEY.
AUGUSTA, (GA) November IL, 1850.
This will certify that have examined the Lightning
Rods, Metallic Points and Isolating Attachments,
featured by Mr. Spra and regard them constructed in
conformity TO the general laws Of the electric fluid the
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. Sc, Emory College, Ca 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. Sprat appear TO TO be
very well deysed and in point OF mechanical construction
tho best have seen.
II Is 10 be hoped that the OF these Rods may become
general important auxiliary defence against danger
which must he regarded Of ordinary magnitude TO
which all buildings are liable. X. SILIMAN Jr,
Prof Of Chem. in the University OF Louisville.
LOUISVILLE, January u, 1851
All orders left at ANDREW DUFFYS Stove Mandatory
It'll street, will be promptly attended TO; at GEORGE
BELLS Alexandria, Ya corner Of King and st. Asaph ss
ap 14-f