Daily American telegraph., 1852-07-20
Protection from Lightning.

rrHE undersigned, being the duly appointed Agent OF
sseRoD MASUTAoroRr Covingon Kentucky bsgs to offer
these superior Rods Of Carbonzed Annealed
combined in their manuacture thus rendering them equal
to copper conductors They in tenee lengths with
ny connscng joints an entire
frame buildings also glass solaes Of novel and nge
NOUS construction patented0 forming locks the whole
mounted with solid platinum silver point (patented)
twelve inches long, surrounded at the with three ang
lar negative magnets which the power to extra
ordinary extent of dischargng the opposite elements
fearful Thunderstorm and embrace the entire perec
ton of science up to the present tme the whole const
ting the most magnificent and perfect silent conductor
Safety has not been compromised by aording these ex
ceent such low rates. the greatest attention has
given their construction as to be readily attached
The astonishing power Of the negative magnets In dschar
strated by the Eectrometer, when unmagnezed points
have shown but slight results though placed under the
electricity from the atmosphere when you would scarcely
suspect any being present.
These being secured by double letters pa
tent hereby cautioned against laying yourselves
liable by purchasing of those who are not authorized or
who substituting inferior limitations. All agents duly
none. CHARLES ". HEYDoN,
do hereby certify that have app lied various powerful
chemical reagents to spras Patent Points for Lightning
Rods and that the results these experiments
that they will resist the action of atmospheric and
thereby preserve the extremity sharpa condition most
in the above experiments were solution Of chloride Of so
dium common salt acec acid sulphurc acid and hydro
choric acid With the first, there action the
metal; with the several acds, there very s9a fact
sufficient to show that atmospheric influences would have
no sensible effect
UNIVERSITY Ca, October 8, 1850.
The Lightning Conductors of Mr. spratt offered to me-
well calculated to perform the Office fo which they
LEXINGTON, KY, February 20, 1850
..u .. CHICAGO September 8, 1860.
This may certify that have examined somewhat crit
cay, Spratts Patent Lightning Rods, and that am
# opinion that it is constructed scientific principles For
combining durability, cheapness, and efficacy, deem 1t
equal and think SUPERIOR to any other rod ever offered
| for my inspection. Prof. JAS. v. 2. BLANET.
AUGUSTA, (GA) November II, 1850.
This will certify that have examined the Lightning
Rods, Metallic Points, and Isoating Attachments, manu-
actured by Mr. Sprat and regard them constructed in
conformity the general laws Of the electric ud and the
from the result of several tests to which they submit
ed 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. sprat appear to to be
ery well DEVISED and in point of mechanical construction,
the best have seen
is to be hoped that the uge of these Rods may
which must be regarded of ordinary magnitude, to
which all buildings liable II. SILIMAN, Jr.
... Prof of Chem. in the University of Louisville.
LOUISVILLE, January u, 1851.
All orders left at ANDREW DUFFYS Stove Mandatory,
7th street, will be promptly attended to- at GEORGE
BELLS Alexandria, ya of King and ST. Asaph ss
ap 1IH