Daily American telegraph., 1852-11-12
Protection from Lightning,

INHE undersigned, being the duly appointed gent Of
SPRATrs ELECTRICIAN ELECTRO MErAILUR0lST LIGHT
kINoRop MAEuFAoroRr Covington Kentucky, begs to offer
these superior Rods of Spiraws Carboned Annealcd
Iron with Zinc Protectors, and Electroposve elements
combined in their manufactured thus rendering them equal
copper conductors. They in teneet lengths with
accurately fitted brass screw connecting Joints an entire
style of metallic patented attachments for brick or
frame buildngs Also glass solaers of novel and inge
nicus construction 1Psented forming lock- the whole
twelve inches long, surrounded at this With three angu
lar negative magnets which possess the power to an extra
most fearful Thunderstorm and embrace the entire per
ton Of science up to the present time the whole consttu
ting the most and perfect silent conductor
presented to the public.
Safety has not been compromised by aording these en-
ceent rods at such low rates the greatest attention has
been given to their construction be readily attached
Tho astonishing power the negative magnets dcharg
ing the air Of its opposite elements has been clearly demon
strated by the Eectromeer, when unmagnetzed points
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
tent you hereby cautioned against laying yourselves
table, by purchasing of those who not authorized
nome nome : - ''-S' 80 CHARLES w.HEYDoN,
Washington City.
do hereby certify that have app lied various powerful
and that the results of these experiments convince
that they will resist the action of atmospheric causes
thereby preserve the extremity SHARP CONDITION most e
In the above experiments solution of chloride Of so
dium, SALT acetc acid suphuric acid and hydro
chloric acid With hs first, there action the
metal with the several acids there very stga
sufficient to show that atmospheric influences would have
no sensible effect.
JoHNLECoNTE, Prof. Of Nat. Phil. etChem.
UNIVERSITY OF GA, October 8, 1850.
The Lightning Conductors Mr. spratt, offered to me-
well calculated 10 perform the Office for which they
intended Yours truly, Prof R0BT. PETER.
LEXINGTON, KY, February 20, 1850
CHICAGO September 8, 1851
This may certify that have examined somewhat crit
caly James Spratts Patent Lightning Rods that
opinion that ii is constructed scientific principles For
combining durability, cheapness and efficacy, deem u
equal and think SUPERIOR to any other rod offered
for my Inspection. Prof JAS. " z. BLANEY.
AUGUSTA, (GA) November II, 1850.
Ths will certify that have examined the Lightning
Rods, Metallic Points, and Isolating Attachments,
conformity to the general laws Of the electric fluid and the
metallic compound constituting the Points promising
from the result several tests TO which they submit
ted years the action those atmospheric
most likely 10 cerrode them. A. MEANS,
Prof Phys &c., Emory College Ca and Prof Chem and
Pharn. Medical College, Ga.
The Lightning Conductors put up by Mr. Henry NJ Smith,
this city the plan Of Mr. sprst appear TO TO be-
very well deyed and In point Of mechanical construction
are the best have seem
1t is to hoped that the of these Rods may become
general important auxiliary defence against danger
which must be regarded Of ordinary magnitude
which all buildings are liable. II. SIIIIAN, Jr,
y Prof Of Chem. in the University Of Louisville.
LOUISVILLE, January rs 1851.
All orders left at ANDREW DUFFYs Stove Manufactory,
18th street. will be promptly attended to; at GEOhGB
BELLS Alexandria, Va OF King and ST. Asaph s
ap1-d