Daily American telegraph., 1852-07-17
Protection from Lightning.

yHE undersigned being the duly appointed Agent Of
spRAITs ELEcfRIcAE AsD ELECTRO y Iasl @
nNaRoD MANUPAcroRr Cosingon Kentucky begs TO oneI
These superior Rods OF Spiral twisted Annea
Iron with Zinc Protectors, and Eectropohve elements
combined In their manufacturer thus rendering them equs
to copper conductors They are tenee lengths with
brasssere connecting joints an entire
new style OF metallic paented attachments for brick or
frame buildings also, glass solaters of novel and inge
NOUS construction, (patened forming lock; the whole
twelve inches long surrounded with three aDgu
lar negative magnets which the power extra
most fearful Thunderstorm embrace the entire perec
ton Of science up to the present me the whole consttu
ting the most magnificent and perfect silent conductor
presented to the public. .tsH4
Safety has not been compromised by sording these
ceent rods at such low rates. the greatest attention has
been given to their construction be readily attached
The astonishing power of the negative magnets in dschar
ing the air of Its opposite elements las been clearly demon
strated by the Electromeer, when unmagnezed 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
These being secured by double letters pa
tent you hereby cautioned against laying yourselves
LIABLE by purchasing Of those who not authorized or
who substituting inferior limitations All agents duly
appointed show their certificates Have good rods or
none CHARLES w. HEYD0N,
Washington CITY,
do hereby certify that have app lied various powerful
chemical reagents to spratt Patent Points for Lightning
Rods and that the results of these experiments convince
thereby the extremity sharpa condition most
senal to protection against lightning The reagents used
the solution chloride
dum common acetic acid sulphurc acid and hydro
chlorc acid With the first there was no action on the
metal with the several acids, there very sga fact
sufficient to show that atmospheric influences would have
''''''' JOHN LEcoNTE, Prof Of Nat. Phil ct tChem
UNIVERSITY OF GA. 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 R0BT. PETER.
LEXINGTON, KY, February 20, 1850.
CHICAGO, September 3, 1850.
This may certify that have examined somewhat criti
caly James Sprats Patent Lightning Rods, and that am
opinion that 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. " y. BLANEY.
AUGUSTA, (GA) November IL, 1850.
This will certify that have examined the Lightning
Rods Metallic Points, and Isolang Attachments, manu-
ctured by Mr. Spra and regard them as constructed in
conformity general of the electric uid and the
metallic compound constituting the Points as promising,
from the result of several tests to which they submit
ted to resist for 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 up by Mr. Henry NJ Smith,
this city, the plan of Mr. Sprat appear to to be
very well DEVISED and point Of mechanical construction
are the best have ever seen.
It 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. SILIMAE, Jr,
Prof of Chem. in the University of Louisville.
LOUISVILLE, January 27, 1851
All orders left at ANDREW DUFFYS Stove Mandatory,
th street. will be promptly attended to; at GEORGE
BELLS Alexandria, Va corner of King and St. Asaph sts
an 14-tf Ha#