Daily American telegraph., 1852-07-14
Protection from Lightning.

THE undersigned, being the duly appointed Agent o.
srRAgrs ELEorlucAS AND EIEcTao lAszr
saRoD MAsuFAoToRr Coyngton, Kentucky pegs 20 ones
these superior Rods Spiral twisted Carbonzed
lrcn with Zinc Protectors, and Eectropostye eenensS
copper conductors They are tenee lengths with
Drassscrew connecting JOINTS an ~
frame buildings also glass isolatsr Of novel and nge
NOUS constructon lpAtented forming lock- the wnoe
ssa s
lar negative magnets which possess the power to extra
ordinary extent dschargg the opposite Of the
most fearful Thunderstorm and embrace the entire perec
ton Of science up to the present tme the whole constu
ting the most magnificent and perfect silent conductor
Safety has not been compromised by aordng these ex
ceent rods at such low rates. the greatest attention has
been given TO their construction be readily
The astonishing power of the negative magnets In dscharg
ing the air of Its opposite elements has been clearly demon
srated by the Esctromeer wnsn ,a poin.s
conditions In fact they gather and silently discharge
electricity from the atmosphere when you would scarcely
These being secured by double letters
tent you hereby cautioned against laying yourselves
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 app lied 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
senal protection against lightning The reagents used
the above experiments solution of chloride Of
dum common sal acec acid suphuric acid and hydro
chloric acid. With the first, there action the
metals with the several acids, there slgha fact
sufficient to show that atmospheric influences would have
no sensible effect.
JOHNLECoNTE, 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 3, 1850.
This may certify that have examined somewhat crit
cally Spras Patent Lightning Rods and that
of opinion that it constructed scientific principles For
combining durability, cheapness, and efficacy, deem 1t
for my inspection Prof. JAS. v. 2. BLANEY.
AUGUSTA, (GA) November IL, 1860
This will certify that have examined the lightning
Rods Metallic Points and Isolatng Attachments manu-
actured by Mr. Spra and regard them constructed in
conformity to the general laws of the electric ud and the
metallic compound constituting the Points as promising,
from the result of several tests to which they submit
ted resist for years the action of those atmospheric
most likely to corrode them. sE 3. A. MEANS, f
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. Sprat appear to me to be
well devised and in point of mechanical construction
are the best l have ever seen.
It 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. II. SlLlMAN, Jr.
Prof Of Chem in the University of Louisville
LOUISVILLE, January q, 1851.
All orders left at ANDREW DUFFYs Stove Mandatory,
7th street. will be promptly attended to- at GEORGE
BELLS Alexandria, Va of King and st. Asaph SITS.
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