Daily American telegraph. [volume] (Washington [D.C.]) 1851-1852, 1852-06-05
Protection from Lightning.

TI,HE undersigned being the duly appointed Agent Of
srRATrs ELECTRICIAN AND ELECTRO asn s
these superior Rods Of CarboniIed Anneaed
from with Zinc Protectors and Eectroposive elements
In their Manufacture; thus rendering them equal
copper as conductors They In teneet lengths, with
brass connecting joints an entire
frame buildings also, glass solaters Of novel and inge
NOUS construction, atened9 forming lock; the whole
twelve inches long, the base with three
lar negative magnets which possess power to an extra
most fearful thunderstorm embrace the entire perfec
ton of science up to the present tme the whole cons
ting the most magnificent and perfect silent conductor
presented to the public.
Safety has been compromised by aording these OK
ceen rods at such low rates the greatest attention has
been given their construction to be readily attached
The astonishing OF the negative In dischar
ing the air OF opposite elements has been clearly demon
strated by the Electromeer when unmagnezed points
have shown but slight results though placed under the
conditions In fact they gather and silently discharge
electricity the atmosphere when you would scarcely
These being secured by double letters pa
tent you are hereby cautioned against laying
LIABLE by purchasing OF those who not authorized or
who substituting inferior limitations All agents duly
appointed can show their certificates Have good rods OF
none CHARLES w. HEiDoN,
Washington City.
do hereby certify that have app lied various powerful
chemical reagents Spratts Patent Points for Lightning
Rods and that the results of these experiments convince
that they will resist the action of atmospheric causes, and
thereby the extremity sarpa condition most
senta to protection against lightning The reagents used
above q
dn common salt acetc acid sulphurc 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
no sensible effect.
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 R0BT. PETER.
LEXINGTON, Ky, February 20, 1850.
CHICAGO, September 8, 1850.
This may certify that have examined somewhat criti-
cay, James Spratts Patent Lightning Rods and that
combining durability cheapness, and efficacy, deem 1t
equal and think SUPERIOR to other rod ever offered
for my inspection. Prof JAS v. y. BLANEY.
AUGUSTA, (GA.) November IL, 1850.
This will certify that have examined the Lightning
Rods, Metallic Points and Iso,atng Attachments, manu-
featured by Mr. spra and regard them 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 the action OF those atmospheric
most likely to corrode them. A. MEANS,
Prof Phys. Sc Emory College, Ga and Prof Chem and
PhGrm, Medical College, Ga.
The Lightning Conductors put up by Mr. Henry NJ Smith,
this city, the plan of Mr. Spratt appear to to be
very well devised and in point of mechanical construction
are the best have
be hoped that the Of these Rods may become
general 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 q, 1851.
All orders left at ANDREW DUFFYS Stove Mandatory
18th street, will be promptly attended to- at GEORGE
BELLS Alexandria, Va corner Of King and ST. Asaph ss
ap 14-u