Daily American telegraph., 1852-05-26
Protection from Lightning.

TTNHE undersigned, being the duly appote $3.50 YIayS
SPRATT's ELECTRICIAN ELECTRO MErALLuhasr liear
NsoRoD MAsuPAoroRT covington, Kentucky begs 70 oer
these superior Rods, Of Spiral iv
Iron with Zinc Protectors and EectroPoiuse elements
Combined in their manufacture; thus rendering them equal
to copper conductors They are IN WIN
new style of metallic patented attachments Tor brick or
frame buildings also glass solaters OF novel and inge
nted with solid platinum silver point patented
twelve inches long, surrounded at the base with three angu
a. negative magnets which the power TO
ordinary extent dscharging the opposite elements of the
most fearful thunderstorm, and embrace the entire perfec
ton science up to the present tme the whole consu.
ting most magnificent and perfect silent conductor
presented to the public.
Safety has been compromised by affording these
ceent rods at such low rates. the greatest attention has
been given TO their be readily attached
The astonishing power of the negative magnets in dscharg
ing the air OF It's opposite elements has been clearly demon
strated by the Eecrometer, when unmagnezed points
have shown but slight results though placed under the
same 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
liable by purchasing of those who not authorized or
who are substituting inferior limitations All agents duly
appointed show their certificates Have good rods or
none. CHARLES w. HEYD0N,
Washington City.
hereby certify that app lied various powerful
chemical reagents to ratts 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 sharpa condition most es
senal protection against lightning The reagents used
in the above experiments solution of chloride Of
dunn common salt acetc acid suphuric acid and hydro
chlorc acid With the first, there no action on 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 PHI. ct Chem.
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 co. 1850.
CHICAGO, September 8, 1850.
This may certify that have examined, somewhat criti
caly James Sprats Patent Lightning Rods and that
of opinion that 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. e. BLANEY.
AUGUSTA, (GA) November II, 1850.
This will certify that have examined the Lightning
Rods Metallic Points, and Isoatng Attachments,
featured by Mr. spra and regard them as constructed in
conformity to 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 years the action of those atmospheric
most likely to corrode them. A. MEANS,
Prof Phys Sc, Emory College, Ga, and Prof Chem. and
phsrm. Medical College Ga.
The Lightning Conductors put up by Mr. Henry NJ Smith,
of this city, the plan of Mr. Sprat appear to to be
very well devised and point Of mechanical construction
the best have
is TO be hoped that the Of these Rods may become
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 q, 1851.
AL orders left at ANDREW DUFFYS Stove Mandatory,
It'll street. will be promptly attended to; at GEOkGE
BELLS Alexandria, Va corner Of King and St. Assph sts
ap lift