Daily American telegraph. [volume] (Washington [D.C.]) 1851-1852, 1852-06-24

I,HE undersigned being the duly appointed Agent Of
NINaRoD MANuPAoroRr Covngton, Kentucky, begs
these superior Rods of Spiral twisted Carbonized Anneaed
Iron with Zinc Protectors and Electroposve elements
combined In their MANUFACTURED thus rendering them equal
10 copper conductors They are In teneet lengths with
new stye Of metallic atented attachnents for brick or
frame buildings ALSO glass isoaters OF novel and inge
NOUS construction, (patented forming lock- the whole
mounted with solid platinum silver point, (patented
twelve inches long surrounded at the base with three
lar negative magnets which possess the power to an extra
most fearful Thunderstorm and embrace the entire perfec
ton of science up to the present me the whole conttu
ting the most magnificent and perfect silent conductor ever
safety has not been compromised by afordng these ex
celent rods such low rates the greatest attention has
been given their construction to be readily attached
The astonishing OF the magnets In discharg
ing the air Of its opposite elements has been clearly demon
strated by the Elecrometer 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 Woud scarcely
These improvements being secured by double letters pa
tent you hereby cautioned against laying yourselves
who substituting inferior limitations All agents duly
appointed can show their Have good RODS OF
none, CHARLES w. HElDON,
Washington City.
do hereby certify that have app lied various powerful
chemical reagents to spratts Patent Points for Lightning
Rods and that the results these experiments convince
thereby preserve the extremity harpa condition most
sentia to protection against lightning The reagents used
dunn common salt acetc acid sulphurc acid and hydro
chlorc acid With the first there action the
meta with the several acids there very g-a fact
sufficient to 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.. Sprat offered me-
are well calculated to perform the office for which they
intended Yours truly, Prof ROBT. PETER.
LEXINGTON KY, February 20, 1850.
CHICAGO, September 8, 1850.
This may certify that ! have examined, somewhat crti
caly James Spratts Patent Lightning Rods and that am
combining durability cheapness and efficacy, deem it
equal and think SUPERIOR to any other rod ever offered
for my inspection Prof. JAS v. T. BLANEY.
AUGUSTA, (GA.) November IL 1850.
This will certify that have examined the Lightning
Rods Metallic Points, and Isolating Attachments manu-
featured by Mr. Spra and regard them constructed in
conformity the general laws of the electric ud and the
metallic compound constituting the Points az promising
from the result of several tests to which they submit
ted resist 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, Ca
The Lightning Conductors put up by Mr. Henry NJ smith,
this city, the plan of Mr. Sprat appear to to be
very well devised and in point of mechanical construction
the best have ever seen. .
1t be hoped that the of these Rods may become
general important auxiliary defence against danger
which be regarded Of ordinary magnitude to
which all buildings are liable. X. SILIMAN, Jr.,
Prof of Chem in the University of Louisville.
LOUISVILLE, January q, 1851.
All orders left at ANDREW DUFFY'S Stove Mandatory
BELLS Alexandria, Va of King and St. Asaph ss
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