Daily American telegraph., 1852-04-30
Protection from Lightning.

J'HE undersigned, being the duly appointed Agent of
SPRATT's BIRCrRIcAs AND LIdHT-
NGRoD MANDATORY, Covingon, Kentucky, begs to offer
these superior Rods OF Spultwisted Carbonized Anncaed
Iron with Zinc Protectors, and Eectropostive elements
combined in their manufacture; thus rendering them equal
copper as conductors They are in teneet lengths with
accurae yttel brass connecting joints entire
frame buildings also glass isoaters Of novel and nge
NOUS construction pacnted) forming lock; the whole
mounted with solid platinum silver point ipatented)
twelve inches long, surrounded at tho base with three
lar negative magnets which possess the power TO extra
ordinary extent Of dischargng the opposite elements of the
most fearful thunderstorm, and embrace the entire perfc
ton of science up to the present time; the whole consu
ting the most magnificent and perfect silent conductor
presented to the public.
Safety has not been compromised by aording these ex
ceent rods at such low rates the greatest attention has
been given their construction SO to ready attached
The astonishing power of the negative magnets in dschar
ing the mir of its opposite elements has been clearly demon
srated by the Eectrometer 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.
These improvements being secured by double letters pa
tent you hereby cautioned against laying yourselves
who substituting Interior limitations. All agents duly
appointed can show their certificates Have good rods or
none, CHARLES W. HEfDON,
Washington City.
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
thereby preserve the extremity harpa condition most
sental protection against lightning The reagents USED
in the above experiments solution Of chloride of
diun common sat acetc acid sulphurc acid and hydro
chloric acid. With the first, there action the
metal with the several acids there very Sg-a fact
sufficient to show that atmospheric influences would have
sensible effect.
JOHN LEcoNTE. Prot. Of Nat Phil ct Chem
UNIVERSITY or Ga. October s. 1850.
The Lightning Conductors Of Mr. Spratt, offered to me,
well calculated to perform the Office for which they
intended Yours, truly. Prof R0BT. PETER.
LEXINGTON, Ky, February 20, 1880
CHICAGO, September 8, 1850.
This may certify that have examined, somewhat criti-
caly James Spratts Patent Lightning Rods and that am
Of opinion that 1t is constructed scientific principles For
combining durability chcapness, and efficacy, deem 1t
equal and think SUPERIOR TO any other rod offered
for my inspection. Prof JAS V. 4. BLANEY.
AUGUSTA, (GA.) November II, 1850
This will certify that have examined the Lightning
Rods. Metallic Points, and Isolang Attachments manu-
factured Mr. Spra and regard them constructed in
conformity the general laws of the electric fluid; and the
metallic compound constituting the Points, promising
the result Of several tests to which they submit
ted TO resist for the action OF those atmospheric
most likely 70 corrodc thom. A. MEANS,
Prof Phys Sc, Emory College, Ga and Prof Chem. and
Pharm. Medical College. Ga.
The Lightning Conductors put up by Mr. Henry VI. Smith,
Of this city, the plan Of Mr. Sprat appear to to be
very well devised and In point of mechanical construction
the best have seen.
is TO be hoped that the Of these Rods become
general important auxiliary defence against danger
which must be regarded Of ordinary magnitude, to
which all buildings liable. u. SIL1MAN, Jr,
Prof Of Chem. in the University OF Louisville.
LOUISVILLE January p, 1851
All orders left at ANDREW DCFFYS Stove Mandatory,
Th street will bo promptly attended to- or at GEORGE
BELLS Alexandria, Va of King and ST. Asaph ste
ap l4-u