Daily American telegraph., 1852-10-29
Protection from Lightning.

TNHE undersigned being the duly appointed Agent Of
SPRATTS ELECTRICIAN AND ELECTRO METALLURGsT LIGHT
HNGRoD MANUfAcToRr Covngton, Kentucky begs to offer
these superior Rods of Carbonized Anneaed
Iron with Zinc Protectors and Electroposive elements
combined in their manufacture; thus rendering them equal
to copper conductors They in tcneet lengths with
accuraeyhtted brassscrew connecting joints entire
style of metallic (patented attachments for brick
frame buildings also, glass isoaters of novel and nge
NOUS construction, (paIented forming lock- the whole
mounted with solid platinum silver point (patented)
twelve inches long, surrounded at the base with three
lar negative magnets possess power an extra
ordinary extent dschargng the opposite elements the
most fearful Thunderstorm and embrace the entire perfc-
ton up the present tme the whole consu-
ting the most magnificent and perfect silent conductor ever
presented to the public.
Safety has not been compromised by aordng these ex
ceent rods at such low rates. the greatest has
given their construction readily attached
The asonshng power of the in discharg.
ing the air Of opposite elements has been clearly
by the Eecrometer when unmagnetized 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
These being secured by double letters pa
tent hereby cautioned against laying yourselves
liable, by purchasing of those who not authorized
who substituting inferior limitations. All agents duly
appointed show their certificates Have good rods
none. CHARLES w. HEYDON,
Washington City.
do hereby certify that have app lied various powerful
chemical reagents to Sprats Patent Points for Lightning
Rods the results of these experiments convince
that they will resist the action of atmospheric and
sental protection against lightning The reagents used
in the above experiments solution of chloride of
choric acid. With the first there action the
metal with the several acids, there very Sia
sufficient to show that atmospheric influences would have
sensible effect
JOHN LEcoNTE, Prof of Nat Phil ct Chem.
UNIVERSITY 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 R0BT PETER.
LEXINGTON, KY, February 90 1850.
CHICAGO, September 3, 1851
This may certify that have examined, somewhat crit-
cally James Spratts Patent Lightning Rods and that
opinion that is constructed scientific principles
combining durability cheapness, and efficacy deem it
equal and think SUPERIOR to any other rod offered
for my inspection. Prof. JAS. v. o. BLANEY.
AUGUSTA, (GA.) November IL, 1850
This will certify that have examined the Lightning
Rods Metallic Points Isoating Attachments manu-.
ctured by Mr. Sprat and regard them constructed in
conformity the general laws of the electric ud and the
metallic compound constituting the Points, promising,
from the result tests to which they submit
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.
The Lightning Conductors put up by Mr. Henry NJ Smith,
of this city, the plan of Mr. Spra appear TO me TO be
very well devised and point of mechanical construction
are the best have
1t 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. X. sILIMAN, Jr.,
Prof Of Chem. in the University of Louisville
LOUISVILLE January II, 1851.
All orders left at ANDREW DUFFYS Stove Mandatory,
7th street. will be promptly attended to- at GEORGE
BELLS Alexandria, Va, Of King and St. Asaph
ap 14-u