Daily American telegraph., 1852-08-05
Protection from Lightning.

vNiE undersigned being the duly appointed Agent o.
SPRATf's ELECfRIoAN MErALLURdiSI ihaai
MASuRAcToRr, Coyngton, Kentucky pegs 70 onel
ese superior Rods, OF Spiral CarbonIeo
iron with Zinc Protectors and Electropositiye elements
combined In their manufactured thus rendering them equal
copper as conductors They In eneet lengths Win
style Of metallic (patenedJ attachnens for brick
frame Duuin9s; also, glass isoaters, of novel and inge
mounted with solid platinum 'u silver point pasnted
twelve inches long, surrounded at the three
ordinary extent dschargng the opposite elements of the
most fearful thunderstorm and embrace the entire perfe
ting the most magnificent and perfect silent conductor ever
presented to the public. t4f tl4 HH
safety has not been compromised by aordnp these Az
ceent at such low rates the greatest attention has
given their construction as to be readily attached
The astonishing power of the negative magnets In dscharg
ing its opposite elements has been clearly demon
strated by the Elecromete when unmagnetized points
have shown but slight results though placed under the
conditions In fact they gather and silently discharge
electricity from the atmosphere when you would scarcely
suspect any being present
These improvements being secured by double letters
tent you hereby cautioned against laying yourselves
liable by purchasing of those who not authorized or
who substituting inferior mutations All agents duly
appointed show their certificates Have good rods or
none. CHARLES W. HEYDON,
Az Washington City.
do hereby certify that have app lied various powerful
chemical Reagents to spratts Patent Points for Lightning
Rods and that results these experiments convince
that they will resist the action of atmospheric and
thereby preserve the extremity sbarpa condition most
senta to protection against lightning The reagents used
in the above experiments solution of chloride of
dum common salt acetc acid suphuric acid and hydro
chloc acid With the first there was no action the
metal with the several acids there very sa fact
sufficient TO show that atmospheric influences would have
no sensible effect.
UNIVERSITY GA, October 8, 1850.
The Lightning Conductors of Mr. spratt, offered to me-
well calculated to perform the Office for which they are
intended Yours truly, Prof ROBT PETER.
LExINGToN Ky, February 90 1850.
CHICAGO, September 3, 1850.
This may certify that have examined, somewhat crt
cally James Spratts Patent Lightning Rods and that am
opinion that IL is constructed scientific principles For
combining durability cheapness, and efficacy, deem
equal and think SUPERIOR to any other rod ever offered
for my inspection. Prof JAS. v. n BLhNEY.
AUGUSTA, (GA) November IL, 1850.
This will certify that have examined the Lightning
Rods, Metallic Points, and Isoating Attachments manu-
featured Mr. Spra and regard them constructed in
conformity to the general laws of the electric fud and the
from the result tests to which they submit
ted resist for 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 d. Smith,
OF this city, the plan of Mr. Spra appear TO me to be
very well devised and in point Of mechanical constructions
are the best have s.
1t to hoped that the of these Rods may become
general important auxiliary defence against danger
which must be regarded as of no ordinary magnitude, to
which all buildings are liable II. SILlMAN, Jr.,
Prof of Chem. in tho University of Louisville
LOUISVILLE, January III 1851.
All orders left at ANDREW DUFFYS Stove Mandatory,
7th street, will be promptly attended to- or at GEORGE
BELLS, Alexandria, Va of King and ST. Asaph sts
ap H-H