Daily American telegraph. [volume] (Washington [D.C.]) 1851-1852, 1852-05-24
Protection from Lightning.

THE undersigned being the duly appointed Agent OF
sPRATT's ELECTRICIAN LIGHT
ROD MANUFAcroRY Covngton, Kentucky, begs TO offer
these superior Rods Spiratwisteu
Irun with Zinc Protectors EectroPosiuve elements
combined IN their manufacture; rendering them equal
copper conductors They are IN teneet lengths with
connecting joints an entire
new STYLE Of metallic patented attachments for brick
budngs also glass isolaters Of novel and inge
Nous construction paented) forming lock- the whole
mounted with solid platinum silver point patented)
twelve inches long, surrounded at the base with three
lar lucrative magnets which possess the power to an extra
most fearful thunderstorm, and embrace the entire pere
ton Of science up to the present time; the whole constu
ting the most and perfect silent conductor
presented to the public.
Safety has not been compromised by aording these
ceen rods at such low rates the greatest attention has
been given to their construction readily attached
The astonishing power of the negative magnets in dcharg
Ing the air OF Its opposite elements has been clearly demon
strated by the Eectroneter when unmagnetized points
have shown but slight results, though placed under the
same 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 hereby cautioned against laying yourselves
table, by purchasing Of those who are not authorized
who are substituting inferior limitations All agents duly
appointed show their certificates Have good rods
none CHARLES w. HEYDON,
Washington City.
do hereby certify that have app lied various powerful
chemical reagents to sprats Patent Points for Lightning
Rods and that the results these experiments
that they will resist the action of atmospheric causes and
thereby the extremity sharpa condition most
sentia protection against lightning The reagents used
in the above experiments solution of chloride of
dunn common sal acetc acid sulphurc acid and hydro
chlorc acid. With the FIRST there action the
metal with the several acids, there very sga fact
sufficient to show that atmospheric influences would have
sensible effect.
JOHN LECONTE Prof of Nat Phil. ct Chem.
UNIVERSITY OF GA, October s. 1850.
The Lightning Conductors of Mr. Spratt, offered to me-
intended Yours, truly, Prof ROBT PETER
LEXINGTON KY, February 90 1850.
CHICAGO, September 8, 1850.
This may certify that have examined, somewhat crit
cay James Spratts Patent Lightning Rods, and that
of opinion that it is constructed scientific principles For
combining durability, cheapness, and efficacy deem 1t
equal and think SUPERIOR any other rod offered
for my inspection. Prof JAS. v. T. BLANEY
AUGUSTA, (GA.) November IL, 1850
This will certify that have examined the Lightning
Rods Metallic Points, and Isolatng Attachments
featured by Mr. Spra and regard them constructed in
conformity the general laws of the electric fluid and the
the result of to which they submit
ted to resist for years the action of those atmospheric
most likely to corrode them. A. MEANS,
Prof Phys Sc, Emory College, Ga, and Prof Chem. and
Pharn., Medical College, Ga
The Lightning Conductors put up by Ar Henry NJ Smith,
of this city, the plan of Mr. Sprat appear to be
very well devsed and in point of mechanical construction
are the best have
1t is to be hoped that the of these Rods may become
general Important auxiliary defence against danger
which must be regarded of no ordinary magnitude, to
which all buildings are liable r. sILIMAN, Jr.,
Prof of Chem in the University of Louisville
LOUISVILLE, January q, 1851.
All orders left at ANDREW DUFFY'S Stove Mandatory
It'll street. will be promptly attended to- at GEOKGE
BELLS Alexandria, Va of King and ST. Asaph SITS.
ap 14-tf