Daily American telegraph., 1852-04-30
Protection from Lightning.

THE undersigned, being the duly appointed Agent
NNGRoD MASUFAcToRr Covngton Kentucky, begs to offer
these superior Rods of Spratwised Carbonzed Annealed
Iron, with Zinc Protectors and Electroposve elements
combined in their manufactures thus rendering them equal
to copper conductors They in cneet lengths with
accurateyfted brass connecting joints. entire
style Of metallic (patened attachments, for brick or
frame budngs also, glass isolaters, of novel and nge
NOUS construction, patcnted) forming lock; the whole
mounted with solid platinum silver point, (patened
twelve inches long surrounded at tho base with three angu
lar negative magnets which the to extra
most fearful and embrace the entire perfec
ton of science to the present me the whole consttu
ting the most magnificent and perfect silent conductor
presented to the public
Safety has not been compromised by afording these
ceen rods at such low rates. the greatest attention has
been given TO their construction to be readily attached
The astonishing Of the negative magnets in dischar
ing the mir opposite clements has been clearly demon
have shown but slight results though placed under the
conditions In fact they gather and silently discharge
electricity from the atmosphere when 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 authorized
who substituting Interior limitations. All agents duly
appointed can show their certificates lave good rods
none. CHARLES w. HEYD0N,
Washington City.
chemical reagents to spratts 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 sharpa condition most
sental 10 protection against lightning The reagents uset
dun common salt acetic acid sulphurc acid and hydro
chlorc acid With the first there action I'll,
metal with the several acids, there very Stga fact
sufficient to show that atmospheric influences would have
n sensible effect.
JOHN LEC0NTE. Prof Of Nat Phil ct Chem.
UNIVERSITY or Ga, October 5, 1850
The Lightning Conductors Of Mr.. spratt offered me-
well calculated to perform the Office for which they
intended. Yours, truly, Prof. R0BT PETER.
LEXINGTON, Ky. February 20, 1850
CHICAGO September 8, 1850.
This may certify that have examined somewhat crit
cay, James Spras Patent Lightning Rods, and that
of opinion that constructed scientific principles For
combining durability, chcapness and efficacy, deem it
equal and think SUPERIOR TO any other rod ever offered
for my inspection. Prof JAS. V. z. BLANEY.
AUGUSTA, (GA) November IL, 1850
This will certify that l have examined the Lightning
Rods, Metallic Points and Isoating Attachments
actured by Mr. Sprat and regard them constructed in
conformity the general laws of the electric fluid 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 70 corrodc th0m. A. MEANS,
Prof Phys &c. Emory College, Ga, and Prof Chem. and
Pharm, Medical College, Ga.
The Lightning Conductors put up by Mr. Henry VI Smith
Of this city, the plan Of Mr. Spratt appear TO to be
very well devised and In point Of mechanical construction
are the best have
IL TO be hoped that the Of these Rods become
general important auxiliary defence against danger
which must be regarded of ordinary magnitude, T.
which all buildings arc liable. H. sILINTAN, Jr,
Prof. of Chem. in the University OF Louisville
LOUISVILLE, January y, 1851.
All orders left at ANDREW DUFFYS Stove Mandatory,
eth street, will be promptly attended 10; or nt GEORGE
BELLS Alexandria, Va corner Of King and ST. Asaph Sta
ap l4-tf