Daily American telegraph. [volume] (Washington [D.C.]) 1851-1852, 1852-09-20
Protection from LIGHTNING.

TNIIE undersigned being duly appointed Agent CT
NGRoD MAsUrAcroRr Covington Kentucky, begs to offer
these superorods of Spirawsted Carbonized Anneaed
combined in tsr manufacturer rendering them equal
to copper conductors They are In eneet lengths, with
new style Of metallic patented attachments for brick
frame buids also, glass olaters of novel and inge-
mounted with SOLD platinum silver point, (patented)
twelve caches long, surrounded at the base with three angu
ordnsS extent dschargng the opposite elements Of the
most fearful Thunderstorm and embrace the entire perfec
ton,sf science up to the present time the whole eonsa
Safety has not been compromised by aordng these ex
ceent such low the greatest attention has
been given their to be readily attached
The astonishing of the negative magnets In dscharg
ing the air of its opposite elements has been clearly demon
srated by the Electromeer, 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 would scarcely
suspect any being present.
tent hereby cautioned against laying yourselves
table, by purchasing of those who not authorized
who substituting inferior limitations All agents duly
appointed show their certificates Have good rods or
none. CHARLES w. HEfDON,
Washington City.
do hereby certify that have app lied various powerful
chemical reagents Sprats Patent Points for Lightning
Rods and that the experiments
they will the action Of atmospheric and
sna 70 protection against shtnng The reagents used
In the above experiments solution OF chloride OF So
dum, common SALT hcetc acid suphurtc acid and hydro
chloric 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
no sensible effect.
JOHN LECoNTR, Prof of Nat. Phil. etChem.
USIvrRsrrY OF Ca, 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 RoBT. PETER.
LEXINGTON, XII, February 20, 1850
CHICAGO September 8, 1850.
This may certify that have examined, somewhat criti
caly James spratts Patent Lightning Rods and that
Of opinion that It Is constructed scientific principles For
combining durability, ceapness, and efficacy, deem II
equal and think SUPERIOR TO any other rod ever offered
for my inspection. Prof JAS. v. z. BLANEY.
AUGUSTA, (GA) November IL, 1850.
This will certify that have examined the Lightning
Rods Metallic Points and Isoating Attachments,
conformity TO the general laws Of the electric uid and the
metallic compound constituting the Points, promising,
the result of several tests TO which they submit
ted resist for years the action Of those atmospheric causes
most likely TO corrode them. A. MEANS,
Prof Phys &c., Emory College, Ca and Prof Chem and
Pharm., Medical College, Ga.
The Lightning Conductors put up by Mr. Henry NJ Smith,
this city, the plan of Mr. Spra appear TO me TO be
very well devised In point Of mechanical construction,
the best have
1t to hoped that the Of these Rods may become
general an important auxiliary defence against danger
which be regarded OF ordinary magnitude, to
which ali buildings are liable. r. sIiIMAN, Jr,
Prof of Chem In the University Of Louisville.
LOUISVILLE, January n, 1851.
All orders left at ANDREW DUFFY'S Stove Mandatory,
eth street. will be promptly attended to; at GEORGE
BELLS Alexandria, ya Of King and St. Asaph sts
ap 14-u