Daily American telegraph., 1852-07-29
Protection from lightning.

VyHE undersigned being the duly appointed Agent OF
SNoRoD MANUYAoroRr Covington Kentucky begs to offer
these superior Rods OF Carbonzed Annealed
Iron, with Zinc Protectors and Electroposdye elements
combined In their manufacturer thus rendering them equal
copper conductors They in tenee lengths with
accurately brassscrew connecting joints, entire
style Of metallic (patented) attachments, for brick or
frame budings also, glass isolaers, of novel and nge
NOUS construction, patented) forming lock; the whole
twelve inches long, surrounded at the base with three angu
lar negative magnets which the power TO extra
ordinary extent OF dschagng the opposite elements OF the
most fearful Thunderstorm and embrace the entire perec
ton to the present time; the whole consttu
ting the magnificent and perfect silent conductor
presented to the public.
SAFETY has not been compromised by aordng these ex
ceent rods at such low rates. the greatest attention has
been given to their construction be readily attached
The astonishing power the negative magnets in dschag
ing the air OF ts opposite elements has been clearly demon
have shown but slight results though placed under the
conditions In fact they gather ana 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 not authorzed or
who are substituting inferior limitations. All agents duly
appointed show their certificates Have good rods or
none. CHARLES W. HEYDoN,
Washington City.
do hereby certify that have app lied various powerful
chemical reagents to Spras Patent Points for Lightning
Rods and that the results of these experiments convince
that they will resist the action Of atmospheric causes and
thereby preserve the extremity sharp-a condition most es
ental protection against lightning The reagents used
in the above experiments solution Of chloride
dium, common sat acec acid suphuric acid, and hydro
choric acid. With the first, there action the
meal with the several acids there very sgh-a fact
sufficient to show that atmospheric influences would have
no sensible effect
JOHN LECONTE, Prof. of Nat. Phil ct Chem
UNIVERSITY OF GA, October $, 1850.
The Lightning Conductors of Mr. Spratt, offered TO me,
well calculated to perform the office for which they
intended. Yours, truly, Prof. KOBT PETER
LEXINGTON, KY, February 20, 1850
CHICAGO September 3, 1850
This may certify that have examined, somewhat cr-
cay James Spratts Patent Lightning Rods and that am
opinion that is constructed scientific principles For
combining durability, cheapness, and efficacy deem it
equal and think SUPERIOR to any other ROD ever offered
for my inspection Prof. JAS. V. T. BLANEY
AUGUSTA (GA) November IL, 1850.
This will certify that have examined the Lightning
Rods, Metallic Points, and Isoating Attachments manu-
featured by Mr. Sprat and regard them constructed in
conformity the general laws Of the electric fluid and the
metallic compound constituting the Points, promising
the result of several tests to which they submit
ted resist 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 In point of mechanical construction
the best have seen.
Ii TO 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 arc liable II. SlLlMAN, Jr,
Prof of Chem. in the University of Louisville.
LOUISVILLE, January 81 1851.
All orders left at ANDREW DUFFY's Stove Mandatory,
7th street. will be promptly attended to- or at GEORGE
BELLS Alexandria, Va corner OF King and St. Asaph sts
ap 14--tf