Daily American telegraph. [volume] (Washington [D.C.]) 1851-1852, 1852-11-02
Protection from Lightning.

VNHE undersigned, being the duly appointed Agent Of
ROD MANupAoToRY Covngton, Kentucky begs offer
these superior Rods of Spiral Carbonzed Annealed
combined their manufacture; thus rendering them equal
copper conductors They In tenee lengths with
style Of metallic patente attachmsnts for brick or
frame buildings also, glass isoaters of novel and nge-
With & silver nnSS
inches long, surrounded at the base with three ang
lar negative which the power to extra
most fearful and embrace the entire perc
on q science up to tne time the whole sonsa
Safety has not been compromised by aordng these ex
cellent rods at such low rates. the greatest has
been given to their construction be readily attached
The astonishing power Of negative magnets in dscharg
the air Of Its opposite elements has been clearly demon
strated by the Eectrometer when unmagnetsed points
have shown but slight results though placed under the
conditions In fact they gather and silently discharge
electricity from the atmosphere when would scarcely
suspect any being present. f3
hereby cautioned against laying yourselves
liable by purchasing Of those who are not authorized
who substituting inferior limitations. All agents duly
none. CHARLES w. HEYDON,
Washington City.
do hereby certify that have app lied various powerful
Rods and that the experiments convince me
that they will resist the action of atmospheric causes
ena to protection against lightning The reagents used
In the above experiments solution of chloride
du common salt acetic acd suphurtc acid, and hydro
ohloric acid. With the first, there action the
metal with the several acids there very sgh-a fact
sufficient to show that atmospheric influences would have
sensible effect.
JOHN LEooNTE, Prof Of Nat. Phil. ct Chem
UNIVERSITY OF GA, October 8, 1850.
The Lightning Conductors Mr. spratt offered to me-
well calculated to perform the Office for which they
intended. Yours truly, Prof R0BT. PETER.
LEXINGTON, KY, February 20, 1885,
CHICAGO September 8, 1861
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 1t
equal and think SUPERIOR to any other rod offered
for my inspection Prof JAS. " 2. BLANEY.
AUGUSTA, (GA) November II, 1850.
This will certify that have examined the Lightning
Rods, Metallic Points, and Isolatng Attachments,
conformity to the general laws Of the electric fluid
metallic compound constituting the Points promising
from the result Of several tests to which they submit
ted to resist for years 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 by Mr. Henry Smith,
Of this city, the plan of Mr. Spra appear to to be
very well DEVISED and In point of mechanical construction
the best have
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. r. SILIMAN, Jr.,
Prof Of Chem, in the University Of louisville
LOUISVILLE, January 27, 1851 s.
All orders left at ANDREW DUFFYS Stove Mandatory,
9TH street. will be promptly attended to- or at GEORGE
BELLS Alexandria, Va corner Of King and St Asaph ss
ap1Eu