Daily American telegraph. [volume] (Washington [D.C.]) 1851-1852, 1852-11-09
Protection from Lightning.

rJHE undersigned, being the duly appointed Agent Of
SPRATTs ELECTRICIAN AND ELECTRO METALLuRGIsT LIGHT
NaRoD MANDATORY Covington Kentucky, begs to offer
these superior Rods, of Spirawed Carbonized Anneaed
Iron with Zinc Protectors and Electroposve elements
combined their manufactured thus rendering them equal
to copper conductors They in teneet lengths with
style of metallic patented attachments, for brick or
frame buildings ALSO glass solaers OF novel and inge
NOUS construction, paented forming lock; the whole
mounted with solid platinum silver point, (paentedo
twelve inches long, surrounded at tho base with three
lar negative magnets which the power to extra
most fearful thunderstorm embrace the entire perec
ton of science up to the present times the whole consttu
ting the most magnificent and perfect silent conductor
presented to the public.
Safety has not been compromised by afording these
celent such Tow rates the greatest attention has
given their construction to be readily attached
The astonishing of the negative in dscharg
the air Of its opposite elements has been clearly demon
strated by the Eectromeer when unmagnetised 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
LIABLE 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. HEYDON,
Washington City.
do hereby certify that have app lied various powerful
chemical reagents to Sprats Patent Points for Lightning
Rods and results these experiments convince
they will resist the action of atmospheric causes and
thereby the extremity sharpa condition most
senal protection against lightning The reagents used
the experiments solution Of chloride of
dunn common salt acetc acid suphurc acid and hydro
chlorc acid With the FIRST there Was action on the
metal with the acids there very Sgha fact
sufficient to show that atmospheric influences would have
sensible effect.
JOHN LECoNTE, Prof Of Nat. Phil. etChem.
UNIVERSITY OF Ga, October 5, 1850.
The Lightning Conductors of Mr. spratt offered to me-
well calculated to perform the Office for which they are
intended Yours truly, Prof R0BT. PETER.
LEXINGTON, KY. February 20, 1850.
CHICAGO September 8, 1851
This may certify that have examined somewhat crt
cay, james Spratts Patent Lightning Rods and that
Of opinion that II Is constructed scientific principles For
combining durability, cheapness and efficacy, deem il
equal and think SUPERIOR to any other rod offered
for my inspection Prof JAS. V. z. BLANEY.
AUGUSTA, (GA.) November H. 1850.
This will certify that have examined the Lightning
Rods, Metallic Points, and Isolatng Attachments, manu-
featured Mr. Spratt and regard them constructed
conformity TO the general laws of the electric fluid and the
from the result Of which they submit
ted resist years the action Of those atmospheric
most likely 10 cerrode them. A. MEANS,
Prof Phys Sc, Emory College, Ga, and Prof Chem. and
Pharm. Medical College, Ga.
The Lightning Conductors put up by Mr. Henry M. Smith,
OF this city, the plan Of Mr. Sprat appear TO be
very well devised and In point Of mechanical construction
the best have
1t is to be hoped that the use Of may become
which be regarded Of ordinary magnitude to
which all buildings are liable. X. SlLlMAN, Jr,
Prof Of Chem. In the University Of Louisville.
LOUISVILLE, January ~ 1851.
All orders LEFT at ANDREW DUFFYS Stove Mandatory
It'll street, will be promptly attended 10; at GEoKGE
BELLS Alexandria, Va corner OF King and st. Asaph ss
ap l4-u