Daily American telegraph., 1852-07-03
Protection from Lightning.

FrHE undersigned, being the duly appointed Agent of
SPRArrs EIRorRIcAN ELECTRO METAILURaIsT LIdHr-
NSdRoD MANurAcroRr Coyingon Kentucky, begs to offer
These superior Rods Of spiral CarbonLed Anneaea
com maan 4, a,nc Proeetors and
20 copper as conductors They in teneet lengths With
ntted brass screw connecting joints an entire
ame budings also, glass solaers Of novel and inge
nous construction (pstened1 forming lock- the whole
twelve inches long at tho base with three ang
ar magnets which possess the power to extra
most fearful Thunderstorm embrace the entire perie
ton Of science up TO the present tme the whole const
presented to the public. a9
Safety has not been compromised by aordng these ex
celent rods at such low rates. the greatest attention has
been given to their construction be readily attached
The astonishing Of the negative dschsrg
ing the air of its opposite elements has been clearly demon
strated by the Elecrometer when unmagnetzed points
have shown but slight results though placed under the
electricity from the atmosphere when you would scarcely
suspect any being present
tent you hereby cautioned against laying yourselves
LIABLE by purchasing of those who not authorized
who substituting inferior limitations All agents duly
appointed show their certfcates Have good rods or
none. s.'@ CHARLES xg.laiNsl " HEYDoS,, S,u
do hereby certify that app lied various powerful
chemical reagents to Spratts Patent Points for Lightning
Rods and that the results Of these experiments convince
that they viii resist the action Of atmospheric causes
thereby preserve the extremity sharpa condition most
ssnta to protection against lightning The Reagents used
In the above experiments solution Of chloride Of
dium Common salt acec acid suphuric acid, and hydro
chlorc acid With the hrst, there action the
metal with the several acids there very a fact
sufficient to show that atmospheric influences would have
JOHN LEcoNTE, Prof Of Nat Phil ct Chem.
UNIVERSITY OF Ga, October s, 1850.
The Lightning Conductors OF Mr. Sprstt, offered to me,
well calculated TO perform the office for which they are
intended Yours truly, Prof ROBT. PETER.
LEXINGTON KY, February TO- 1850
CHICAGO, September 8, 1850.
caly James Spratts Patent Lightning Rods and that am
opinion that il ia 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. O. BLANEY.
AUGUSTA (GA) November ii, 1850
This will certify that have examined the Lightning
Rods Metallic Points, and Isoating Attachments manu-
factured by Mr. Spra and regard them constructed in
conformity to the general laws of the electric fud and the
metallic compound constituting the Points, promising,
from the result of several tests to which they submit
ted to resist for the action OF those atmospheric causes
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. Sprat appear to to be
very well DEVISED and in point OF mechanical construction
are the best have
1t is 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. SILIMAN, Jr.,
Prof Of Chem in the University of Louisville
LOUISVILLE, January q, 1851.
All orders left at ANDREW DUFEYs Stove Manufetory,
BELLS Alexandria, Va of King and st. Asaph sts
an