Daily American telegraph., 1852-07-13
Protection from Lightning.

INHE undersigned being the duly appointed Agent OF
Il sPRArrs ELEcrRIcAS LIGHT
ssRoD MAsuPAofoRY Covington, Kentucky, begs 70 oeE
these superior Rods Of Spiral twisted Anneaeo
combined their manuiaetare thus rendering them equal
70 copper as conductors They In eneet lengths with
new style Of metallic (atented) attachments for brick or
isme omldngs also glass isolaters of novel and nge-
mounted with solid platinum silver point (patented
inches long, surrounded at the with three angu
ordinary extent dischargng the opposite elements Of the
most fearful thunderstorm, and embrace the entire perec
ton Of science up TO the present me the whole cons.
ting the most magnificent and perfect silent aver
presented TO the public
Safety has not compromised by aordine these ex
ceent such low rates. the greatest attention has
been given TO their construction be readily attached
The astonishing power the negative magnets In discharq
ing the air Of It's opposite elements has been clearly
sraed by the Eectrometer, when unmagnetzed 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.
tent you 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 or
none. CHARLES w. HEYDON,
Washington City
do hereby certify that have app lied various powerful
Rods and that the results Of these experiments convince
that they will resist the action of atmospheric causes and
ne extremity condition most es
In the above experiments were solution Of chloride Of
dium common acetic acid sulphurc acid and hydro
chloric acid. With the rst there action the
metal with the several acds there very sh-a fact
sufficient to show that atmospheric influences would have
no sensible effect.
JOHN LEcoNTE. Prof Of Nat. Phil. ct Chem.
USIvmsITY OF GA October s, 1850.
The Lightning Conductors Of Mr. spratt 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 8, 1850.
This may certify that have examined somewhat crt
cally James Sprats Patent Lightning Rods and that
Of opinion that constructed scientific principles For
combining durability, cheapness and efficacy, deem 1t
equal and think SUPERIOR to any other rod offered
for my inspection. Prof JAS W.. BLANEY.
AUGUSTA, (GA.) November H. 1850.
This will certify that have examined the Lightning
Rods Metallic Points, and Isolang Attachments,
factured 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 &C., 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. Sprst appear to 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 no ordinary magnitude to
which all buildings liable. II. SILIMAN, Jr.,
Prof Of Chem. in the University of Louisville.
LOUISVILLE January q, 1851.
All orders left ANDREW DUFFY'S Stove Mandatory
7th street. will be promptly attended to; at GEORGE
BELLS Alexandria, Va corner of King and St Asaph ss
ap 14-tf