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

rT,HE undersigned being the duly appointed Agent Of
NNaRoD MANDATORY Coyington Kentucky begs to offer
these superior Rods Sprawsted Carbonzed Annealed
WIN anc anu nens
to copper conductors They in tenfeet lengths with
accuraeydtted brassscrew connecting joints an entire
frame buildings ALSO glass solaers OF novel and inge
NOUS construction, patened0 forming lock- the whole
mounted with solid platinum silver point lpatented)
twelve inches long, at the base with three ang
lar negative magnets which the power to an extra
ordinary extent dschaging the opposite elements of the
most fearful Thunderstorm and embrace the entire perc
ton eff science to the present me the whole constitu
ting the most magnificent and perfect silent conductor ever
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 to be readily attached
The astonishing of the negative magnets in dscharg
strated by the Elecrometer, when unmagnetzed 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
who 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 spratt Patent Points for Lightning
Rods that the results these experiments convince
that they will resist the action of atmospheric causes and
thereby preserve the extremity harpa condition NEST
senta TO protection against lightning The reagents
in the above experiments were solution chloride of So
dum common sat) acetc acid suphuric 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.
UNIVERSITY OF Ga, October s, 1850.
The Lightning Conductors of Mr. spratt offered to me,
are well calculated to perform the Office for which they are
LEXINGTON, KY, February 20, 1850
CHICAGO September 3, 1850.
This may certify that have examined, somewhat criti
cay James Spratts Patent Lightning Rods and that
of opinion that It is constructed scientific principles For
combining durability cheapness, and efficacy deem IL
equal and think SUPERIOR to any other rod offered
for my inspection. Prof. JAS. V. z. BLANEY.
AUGUSTA, (GA) November IL, 1850.
This will certify that have examined the Lightning
Rods, Metallic Points and Isoating Attachments,
featured by Mr. spra and regard them constructed in
conformity the general laws of the electric fluid and the
metallic compound constituting the Points, promising,
from the result of several tests TO which they submit
ted to resist for the action Of those atmospheric
most likely TO corrode them. A. MEANS,
Prof Phys &c.. Emory College, Ga and Prof Chem. and
Phsrm, Medical College, Ga.
The Lightning Conductors put up by Mr. Henry NJ Smith,
this city, the plan of Mr. Spra appear to to be
very well devised and In point Of mechanical construction
the best have
1t is to be hoped that the use these Rods may become
general as an important auxiliary defence against danger
which must be regarded Of ordinary magnitude to
which all buildings are liable. X. SILIMAN, Jr.
Prof Of Chem. In the University Of Louisville.
LOUISVILLE, January ~, 1901.
All orders left at ANDREW DUFFYS Stove Mandatory,
7th street, will be promptly attended TO; at GEORGE
BELLS Alexandria, Va, Of King and St. Asaph SITS.
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