Daily American telegraph., 1852-06-07
Protection from Lightning.

r,HE undersigned being the duly appointed Agent OF
il SPRATTs ELECTRICIAN ELECTRO MErALLuR6ISr LIGHT
NGRoD MANDATORY Coyngton, Kentucky, begs to offer
these superior Rods of spratwisted Anneaeo
combined in their manufacturer thus rendering them equal
to copper conductors They in teneet lengths with
style of metallic atented attachments for brick
frame buildings Also glass isoaters OF novel ana inge
mounted with solid platinum silver point, (patented
twelve inches long, surrounded at the base with three angu
lar negative magnets which possess the power to an ira
most fearful thunderstorm, and embrace the entire perfe
ton of science to the present tme the whole consttu
ting the most magnificent and perfect silent conductor
presented to the public.
Safety has not been compromised by aordng these
ceen rods at such low rates. the greatest attention has
been given their construction to be readily attached
The astonishing OF the negative magnets In discharg
ing air of its opposite elements has been clearly demon
strated by the Eectrometer 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 mproy being secured by double letters pa
tent you hereby cautioned against laying yourselves
liable by purchasing of those who are not authorze or
who substituting inferior limitations All agents duly
appointed can show their certificates Have good rods or
none. CHARLES W. liEiDoN,
Washington City.
do hereby certify that have app lied various powerful
chemical reagents to spras Patent Points for Lightning
Rods and that the results of these experiments convince
that will resist the action of atmospheric causes and
thereby preserve the extremity sharpa condition most es
sentia protection against lightning The reagents used
dum Common sat acetc acid suphurc acid, and hydro
chloric acid With tho first, there action the
metal with the several acids there was very g-a fact
sufficient show that atmospheric influences would have
| no sensible effect
JOHN LECoNTE, Prof of Nat Phil ct Chem
UNIVERSITY OF GA, October 8, 1850.
The Lightning Conductors of Mr.. spratt, offered to
we'll calculated to perform the Office for which they are
| intended Yours truly, Prof ROBT PETER
| LEXINGTON KY, February 90 1850.
CHICAGO, September ., 1850
This may certify that l have examined, somewhat crd-
cally James Spratts Patent Lightning Rods and that am
combining durability cheapness, and efficacy, deem
equal and think SUPERIOR to other rod ever offered
| for my inspection. Prof. JAS. v H. BLhNEf.
AUGUSTA, (GA.) November H. 1850.
This will certify that have examined the Lightning
Rods Metallic Points, and Isolating Attachments, manu-
featured by Mr. Sprat and regard them as constructed III
conformity 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 to resist for the action OF those atmospheric causes
| most likely to corrode them. A. MEANS,
Prof Phys Sc, Emory College, Gu, 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 DC
very well devised and in point of mechanical construction
| the best have
1t Is to be hoped that the of these Rods become
important auxiliary defence against danger
which be regarded of ordinary magnitude &c
| which all buildings are liable. h. SILIMAN, Jr.,
Prof of Chem in the University Of Louisville.
LOUISVILLE January p, 1851.
All orders left at ANDREW DUFFYS Stove Mandatory
It'll street, will be promptly attended To; or at GEORGE
BELLS Alexandria, Va corner Of King and ST. Asaph SITS
| ap lift