Daily American telegraph., 1852-04-27
Protection from Lightning.

VHE undersigned, being the duly appona Iauy
NSeRop MANUYAcroRY Coyngton, Kentucky begs 70 oneI
these superior Rods, Of Spiral i,
combined IN their manufacturer thus rendering them equal
to copper as conductors They are In tenes. WIN
new vIs ~ metallic (patepted) Attachments for brick
frame buidings also glass isolaters OF novel and inge
,,s eonstrnction (paented forming lock; the whole
Onntad with solid platinum silver point, (patented
inches long surrounded at the base with three
I negative magnets which possess the power to
ipary extent discharng the opposite elements of the
most fearful Thunderstorm and embrace the entire perc
lion Of science up the present me the whole consttu
ting the most magnificent and perfect silent conductor
presented 20 the public. UsEN
safety has not been compromised by aorng these ex
oen rods at such low rates. the greatest attention has
given to their eopsucton to be readily attached
The astonishing Of the negative magnets in dcharg
strated by the Eiectrometer when unmagnetze 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 pa
tent you hereby cautioned against laying yourselves
table, by purchasing of those who are not authorized or
who substituting inferior limitations All agents duly
appointed can show their certificates Have good Toas or
none CHARLES w. HEYD0N,
Washington City.
do hereby certify that have app lied various powerful
chemical reagents sprats Patent Points for Lightning
Rods and that the results of these experiments convince
that they will resist the action Of atmospheric and
thereby preserve the extremity sharpa condition most es.
sena 10 protection against lightning The reagents used
in the above experiments solution Of chloride of
dunn common aoec acid sulphurc acid, and hydro
chloric acid. With the FIRST there action on the
metals with the several acids, there very stgha fact
sufficient show that atmospheric influences would have
no sensible effect.
JOHN LECoNTE Prof Of Nat Phil ct Chem.
UNIVERSITY OF GA, October g. 1850 I... "..#
The Lightning Conductors of Mr. sprat, offered to me,
well calculated perform the Office for which they are
LEXINGTON, KY, February 20, 1885,
CHICAGO, September 8, 1850.
This may certify that have examined somewhat criti-
lama Enratt' Lightning Rods.
of opinion 1t Is constructed scientific principles For
combining durability, cheApness, and efficacy, deem 1t
equal and think SUPERIOR to any other rod ever offered
for my inspection Prof JAS. v. n BLANEY. +
AUGUSTA (GA.) November H. 1850.
This will certify that have examined the Lightning
Rods Metallic Points, and Isoating Attachments, manu-
featured by Mr. Sprat and regard them constructed IN
conformity to the general laws OF the electric uid and the
metallic compound constituting the Points as promising
from the result of several tests to which they submit
ted the action Of those atmospheric causes
most likely to corrode thom A. MEANS,
Prof Phys. Sc, Emory College, Ga and Prof. Chem and
Pharm., Medical College, Ga.
The Lightning Conductors put up by Mr. Henry Smith,
this city, the plan of Mr. sprat appear to to be
very well devised and point of mechanical construction
the best have ever seen.
1t Is be hoped that the Of these Rods become
general important auxiliary defence against danger
which must be regarded Of ordinary magnitude to
which all buildings liable. r. SILIMAN, Jr,
Prof of Chem. in the University of Louisville.
LOUISVILLE, January n, 1851. |.. . III ....af s#
7th street, will be promptly attended to- or at GEORGE
BELLS Alexandria, Va Of King and St. Asaph sts
ap lift -.