Daily American telegraph. [volume] (Washington [D.C.]) 1851-1852, 1852-04-19
Protection from Lightning,

rNHE undersigned, being the duly appointed Agelt OF
NGRoD MANuFAcToRY Coyington, Kentucky, begs to offer
these superior Rods of Spratwted Carbonized Anneaed
WIN ano anu s e eleenss
70 copper conductors They are In teneet lengths with
accuratelytted brassscrew connecting joints an entire
new style Of metallic patented attachments for brick or
frame buildings ALSO glass isoaters OF novel and inge
Nous construction (patented forming lock; the whole
mounted with solid platinum silver point, lpatented)
twelve inches long surrounded the base with three angu
negative magnets which the power 10 an extra
fearful thunderstorm and embrace the entire perfec
ton Of science to the present me the whole constu
ting the most magnificent AMI perfect silent conductor ever
presented TO the public
Safety has not been compromised by aording these
ceent rods at such low rates. the greatest attention has
been given their TO be readily attached
The astonishing power OF the negative magnets In discharg
ing the air Of opposite elements has been clearly demon
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
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 or
none CHARLES w. HEYDON,
Washington City.
do hereby certify that have applied various powerful
chemical reagents to spras 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 sharpa condition most
senal TO protection against lightning The reagents used
In the experiments Chloride
dium Common sa acetic acid sulphurc acid and hydro
choric acid With the first there was no action on the
metal with the acids there very sgha fact
sufficient to show that atmospheric influences would have
no sensible effect,
JOHN LECoNTE. Prof of Nat Phil. ct Chem.
UNIVERSITY or Ga, October 8, 1860.
The Lightning Conductors of Mr.. Spra offered to me-
are well calculated to perform the office for which they
intended. Yours truly, Prof R0BT. PETER.
LEXINGTON KY, February 20, 1850.
CHICAGO, September g. 1850.
This may certify that have examined, somewhat crt
caly James Spratts Patent Lightning Rods and that
combining durability cheapness, and efficacy deem it
equal and think SUPERIOR to any other rod offered
for my inspection. Prof JAS. V. a. BLANEY.
AUGUSTA, (GA.) November H. 1850.
This will certify that have examined the Lightning
Rods, Metallic Points, and Isolatng Attachments,
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 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
Pharm. Medical College, Ga
The Lightning Conductors put up by Mr. Henry NJ Smith,
of this city, the plan of Mr. Spratt appear to be
very well devised and in point of mechanical construction
are the best have
is to 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. r. SILIMAN, Jr.,
Prof of Chem in the University of Louisville
LOUISVILLE, January n, 1851.
All orders left at ANDREW DUFFY'S Stove Mandatory
It'll street, will be promptly attended to; at GEORGE
BELLS, Alexandria, Va, of King and ST. Asaph SITS
ap lift