Daily American telegraph. [volume] (Washington [D.C.]) 1851-1852, 1852-09-03
Protection from Lightning,

JNHE undersigned being the duly appointed Agent OF
SPRATT's ELECTRICIAN ELECTRO MErALLURGIST LIGHT
NNGRoD MANDATORY Covngton Kentucky begs to offer
these superior Rods of Spiral Crbonized Anneaed
Iron with Zinc Protectors and Electropostye elements
combined in their manufacturer thus rendering them equal
to copper conductors They in eneet lengths with
accuraey6tted brassscrew connecting joints, entire
style of metallic patented attachments for brick
frame buildings ALSO glass isolaters of novel and inge
NOUS construction, (patented) forming lock; the whole
twelve inches long, surrounded at the base with three angu
ordinary extent dschargng the opposite elements of the
most fearful Thunderstorm and embrace the entire perec
ton Of science up to the present me the whole constu
ting the most magnificent and perfect silent conductor ever
presented to the public
Safety has not been compromised by aoring these
ceen rods at such low rates. the greatest attention has
been given to their construction to be readily attached
The astonishing of the negative magnets in discharg
strated by the Electrometer whom unmagnets.d 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 rs
tent you hereby cautioned against laying yourselves
liable by purchasing Of those who are not or
who are substituting inferior limitations All agents duly
appointed can show their certificates Have good rods or
nome CHARLES W. HEYD0N,
Washington City.
do hereby certify that have app lied various powerful
chemical reagents to sprats Patent Points for Lightning
Rods and that the results of these experiments convince
that they will resist the action Of atmospheric causes and
thereby preserve the extremity condition most es
senta to protection against lightning The reagents used
In the above experiments were solution of chloride Of 80
dunn common salt acetc acid suphuric acid and hydro
chlorc acid With the first, there no action the
metal with the several acids there very sa fact
sufficient TO show that atmospheric influences would have
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, Kr., February 20, 1850.
CHICAGO, September 8, 1850
This may certify that have examined, somewhat crit
cay James spratts Patent Lightning Rods and that
of opinion that 1t Is constructed scientific principles For
combining durability, cheapness, and efficacy deem It
equal and think SUPERIOR to any other rod offered
for my inspection. Prof JAS. v. a. BLANEY.
AUGUSTA, (GA) November IL, $780,
This will certify that have examined the Lightning
Rods, Metallic Points, and Isolating Attachments
featured by Mr. Sprat and regard them as constructed in
conformity TO the general laws Of the electric ud and the
metallic compound constituting the Points, promising,
the result several 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 NJ Smith,
this city, the plan of Mr. Spra appear 10 to be
very well devised and in point Of mechanical construction,
the best have SEEM
1t 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 r. SILIMAN, Jr.,
Prof Of Chem. in the University Of Louisville
LOUISVILLE, January 27 1851.
All orders left at ANDREW DUFFYs Stove Mandatory,
It'll street, will be promptly attended to- ut GEORGE
BELLS Alexandria, Va corner of King and St. Asaph sts
ap 14-u