Daily American telegraph., 1852-05-18
Protection from Lightning.

rNHE undersigned, being the duly appolntel As9ns -
SPRATTs ELECTRICIAN ELECTRO MsrALLUn0sr LIEN
NaRoD MANuFAcroRY Coyipgton, Kentucky begs 70 oel
these superior Rods Of spiraltwised Caroon sn
IrOn with Zinc Protectors aud Electroposluts eenion
combined in their manufacturer thus rendering Them equ
to copper conductors They are IN t a ,
accuraely fitted brassscrew connecting yonG a snure
new syle OF metallic (patented attachmen Tor prick OF
frame buildingsj also, glass isoiateIs, - ,n u hse
moantsd with solid platinum silver point patented,
twelve inches long a. ns oase Win angn
onayy extent dscharng the opposite elements OF the
most fearful thunderstorm and embrace the entire pere
Z ~ science up the present time; the whole consttu
ting die most magnificent and perfect silent conductor
| presented TO the pubic.
safety not been compromised by aording these
ceen rods at such low rates the greatest attention has
given to their construction, to be readily attached
The astonishing power of the negative magnets discha
the air of its opposite elements has been clearly demon
sraed by the Eectrometer, when unmagnetized points
but slight results though placed under the
conditions In fact they gather and silently discharge
electricity from the atmosphere when you would scarcely
These being secured by double letters pa
tent you are hereby cautioned against laying yourselves
liable by Of those who are not authorized or
appointed can show their certificates Have good RODS or
none. CHARLES W. HEfDoN,
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
thereby preserve the extremity sharpa condition most es
scntia protection against lightning The used
in the above experiments were solution OF chloride OF So
chloric acid. With the FIRST there was action on the
metal with the several acids there was slga fact
sufficient 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. spratt, offered to me,
well calculated to perform the Office for which they
intended. Yours, truly, Prof R0BT. PETER.
LEXINGTON, KY, February 20, 1850. .U
CHICAGO, September 8, 1850.
This may certify that have examined somewhat criti-
cay, James Spratts Patent Lightning Rods, and that
Of opinion that 1t is constructed scientific principles For
combining durability, cheapness, and efficacy, deem il
equal and think SUPERIOR to any other rod offered
for my inspection. Prof JAS. v. 2. BLANEY.
a AUGUSTA, (GA) November H. 1850.
Rods Metallic Points, and Isoating Attachments
featured by Mr. Spra and regard them constructed In
conformity to the general laws Of the electric and the
metallic compound constituting the Points, promising,
from the result several tests to which they submit
ted to resist for years the action of those
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 H. 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 ever seen. 81 sgrz = rg II
is be hoped that the these Rods may become
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 q, 1851. 800
AL orders left at ANDREW DUFFYS Stove Mandatory,
7th street, will be promptly attended to; at GEORGE
BELLS Alexandria, Va of King and St. Asaph sts
mp 14-tf r 81 l.s + 3, n s. la.,e,H