Daily American telegraph. [volume] (Washington [D.C.]) 1851-1852, 1852-11-04
Protection from Lightning.

TIME undersigned being the duly appointed Agent OF
SPRATT'S ELECTRICIAN EIEcTHo METALLURGIST LIGHT
NaRoD MASurAcroRr Covington Kentucky begs to offer
these superior Rods ofspirawsed Carbonized Anneaed
Iron with Zinc Protectors and Elecropostive elements
combined in their manufacturer thus rendering them equal
copper conductors They in eneet lengths, with
accuraeytted brassscrew connecting joints, entire
style of metallic patented attachments for brick
frame bhdings also glass isolaters of novel and nge
mounted with solid platinum silver point, (patentedJ
twelve inches long, surrounded at the base with three angu
ordinary extent dischagng the opposite elements Of the
most fearful thunderstorm and embrace the entire perfec
ting the most magnificent and perfect silent conductor ever
Safety has not been compromised by aordng these ex
ceent such low rates. the greatest attention has
been given to be readily attached
The astonishing Of the negative in dscharg
ing the air of Its opposite elements has been clearly demon
strated by the Elecromeer 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
tent you hereby cautioned against laying yourselves
LIABLE by purchasing of those who not authorized or
who substituting inferior mutations All agents duly
none CHARLES W. HEYDON,
Washington City.
do hereby certify that have app lied various powerful
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
in the above experiments were solution of chloride OF so
dium common sat acec acid sulphurc acid and hydro
chloric 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. etChem
UNIVERSITY OF "a, October 5, 1850.
The Lightning Conductors Mr. spratt offered to me-
well calculated to perform the office for which they
intended. Yours, truly, Prof R0BT. PETER.
LEXINGTON, KY February 20. 1850.
This may certify that have examined somewhat cft
cally James Sprats Patent Lightning Rods, and that
of opinion that II Is constructed seen8c principles For
combining durability, cheapness and efficacy, deem II
equal and think superior, to any other rod offered
for my inspection. Prof JAS v y. BLANEY.
7: AUGUSTA, (GA.) November IL, 1850.
This will certify that have examined the Lightning
Rods Metallic Points, and Isolatng Attachments, manu-
conformity general laws the electric d the
metallic compound constituting the Points promising
the result of several tests to which they submit
ted resist years the action Of those atmospheric
most likely to corrode them A. MEANS,
Prof Phys. &c.. Emory College Ga, and Prof Chem ana
Pharm, Medical College, Ga.
The Lightning Conductors put up by Mr. Henry Smith,
of this city the plan of Mr. spatt appear to to be
very well devised In point Of mechapica construction
the best have
1t Is 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.
1oUIsvIIIR, January u, 1851.
All orders left at ANDREW DUFFYs Stove Mandatory,
eth street, viii be promptly attended TO; at GEORGE
BELLS Alexandria, Va Of King and st. Asaph SITS.
ap LIFT