Daily American telegraph., 1852-06-30
Protection from Lightning.

sHE undersigned, being the duly appointed Agent OF
SFATFs ELEcTRIcAN ELECTRO MErAIIURGIsr LIGHT
EGRop ASUFAcTeRT, Coyingon, Kentucky begs to oier
these superior Rods OF Spalwsted Carbonzed Annealed
WIN enc protectors and sn aans1
copper a. They are in eneet lengths WIN
brass screw connecting joints an entire
new style OF metallic aente attachments or brick or
Frame buildings also, glass solaters novel and nge
NOUS constrncton patentedo forming lock; the whole
mounted WITH solid platinum silver point, (patentedO
twelve inches long, surrounded at the three angu
lar negative magnets which possess the power to extra
ordinary extent OF diBchargng the opposite elements
most fearful Thunderstorm and embrace the entire perec
ton of science up to the present me the whole constu
ting the most magnificent and perfect silent conductor
presented to the public -f,r.{. .e#l
Safety has been compromised by aording these ex
ceent rods at such low rates. the greatest attention has
been given their construction TO be readily attached
The astonishing power Of the negative in dscharg
s4aed M bv the Eeetrometer when unmagnetaea points
have shown but slight results though placed under the
electricity fom the atmosphere when you would scarcely
suspect any being present. .
These improvements being secured by double letters pa
tent hereby cautioned against laying yourselves
LIABLE by purchasing of those who are not or
who substituting inferior limitations. All agents duly
appointed can show their certificates Have good rods OF
none. CHARLES ". HEYDoN,
'I ##.u.. Washington City.
do hereby certify that have app lied various powerful
chemical reagents to spras Patent Points for Lightning
that they will resist the action of atmospheric causes
thereby preserve the extremity SHARPE condition most
sentalto protection against lightning The reagents used
in the above experiments solution of chloride
dium, Common sa acetc acid sulphurc acid and hydro
choric acid. With the first, there action the
metal with the several acids, there very stgha fact
sufficient to show that atmospheric influences would have
no sensible effect. ". VIA s.tNth
JOHN LECoNTE, Prof of Nat. Phil. ct Chem.
UNIVERSITY OF GA, October g. 1850.
The Lightning Conductors of Mr. spratt offered TO me,
well calculated to perform the office for which they
intended. Yours, truly Prof ROBT. PETER.
LEXINGTON, KY. February 20, 1850.
CHICAGO September 8, 1850.
This may certify that have examined somewhat Griti
l1rr
opinion that is constructed scientific principles For
combining durability, cheapness and efficacy, deem u
equal and think SUPERIOR to any other rod ever offered
for my inspection Prof JAS. " u BLANE1.
IA. AUGUSTA, (GA) November IL, 1850.
This will certify that have examined the Lightning
Rods Metallic Points, and Isoating Attachments, manu-
facured by Mr. Spra and regard them constructed In
conformity to the general laws of the electric ud and the
metallic compound constituting the Points, promising,
from the result of several ests to which they submit
ted resist for years the action of those ATMOSPHERIC
most likely to corrode them ,.. u A. MEANS, #.
Prof Phys. &c.. Emory College, Ga and Prof Chem. and
Pharm, Medical College, Ga. .4a ,
The Lightning Conductors put up by Mr. Henry NJ Smith,
of this CITY, the plan of Mr. Sprat appear to to be
well devised and in point of mechanical construction
are the best have seen.
1t is to 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 are liable. r. SILIMAN, Jr.,
Prof of Chem. in the University of Louisville
LOUISVILLE, January 81 1851.
All orders left at ANDREW DUFFYs Stove Mandatory,
BELLS Alexandria, Va of King and ST. Asaph sts
nm . y