Daily American telegraph., 1852-10-30
Protection from Lightning.

| appointed Agent
spnArrs ELEcrRIcAN ELEcrRo MErAlLuRorsr LIGHT
MANuTAcToRY Covington Kentucky, begs offer
Iron with Zinc Protectors and Electroposye elements
combined in their manufacture thus rendering equal
connecting ionts an entire m
now style Of metallic patcntcd attachments for brick
frame frame nunangs aiso glass soiaers oi novel ana nge
mounted with solid platinum silver point, patented)
inches long at the base with three angu
ordinary extent Of dischargng the opposite elements
ton of science to the present time; the whole constu
ting the most magnificent and perfect silent conductor
presented to the public tis1H .E3yg 3t .t
Safety has not been compromised by afordng these
ceent rods at such low rates. the greatest attention
been given to their to be readily attached
The astonishing of the negative magnets in scharg
ing the air Of its opposite elements has been clearly
straed by the Electrometer when unmagnetized points
have shown but slight results though placed under the
conditions In fact they gather silently discharge
electricity from the atmosphere when you would scarcely
suspect any being present
These improvements being by double letters pa
tent you hereby cautioned against laying yourselves
LIABLE by purchasing of those who not authorized
who substituting inferior limitations All agents duly
appointed can 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 Sprat Patent Points for Lightning
Rods and that the results Of these experiments convince
that they will the action of atmospheric causes
thereby the extremity condition most es
senal 10 protection against lightning The reagents used
In the above experiments solution of chloride
dum common sat aeec acid sulphurc acid and hydro
chlorc acid With the first, there action the
metal with the several acids, there very ga fact
sufficient to show that atmospheric influences would have
no sensible effect .-'+ets -5s te-.
JOHN LEcoNTE Prof of Nat. Phil. ct Chem.
UNIVERSITY OF Ga, October 8, 1850.
The Lightning Conductors of Mr. sprat offered to me,
well calculated TO perform the Office for which they
intended. Yours, truly Prof RoBT. PETER
LEXINGTON, Ky, February 20, 1850. 5f eE..s.s.
CHICAGO, September g. 1s5oJI
This may certify that have examined somewhat cr-
cay James Spratts Patent Lightning Rods and that
opinion that it is constructed scientific principles
combining durability, cheapness and efficacy, deem 1t
equal, and think SUPERIOR to other rod offered
for my inspection. Prof JAS v. T. BLANEY. Z
AUGUSTA, (GA.) November H. 1850.
This will certify that have examined the Lightning
Rods, Metallic Points, and 1solatng Attachments
featured by Mr. Sprat and regard them const eed in
conformity the general laws of the electric fluid
metallic compound constituting the Points, PROMISING
from the result Of several tests 70 which they submit
ted resist for years the action OF those atmospheric
most likely to corrode them. A. MEANS,
Prof Phys So, Emory College, Ga, and Prof Chem.
Pharm, Medical College. Ga,
The Lightning Conductors put up by Mr. Henry NJ Smith,
of this city, the plan of Mr. spratt, appear to
very we'll devised and point of mechanical construction
the best have
Is to be hoped that the Of these Rods become
general important auxiliary defence against danger
which must be regarded of ordinary magnitude
which all buildings liable. X. SILIMAN Jr., ~
Prof Of Chem. in the University of Louisville.
LOUISVILLE, January "a, 1851. W 1920 Ht.rFa1s
All orders left at ANDREW DUFFYs Stove
7th street. will be promptly attended to; at GEokGE
BELLS, Alexandria, Va Of King and St Assph s
sp1+d