Daily American telegraph. [volume] (Washington [D.C.]) 1851-1852, 1852-06-21
Protection from Lightning.

NHE und srsignod being the duly appointed Agent Of
SPRATTs ELECTRICIAN AND ELECTRO MErAIIURGIsr LIGHT
NNaRoD MANDATORY Coyingon Kentucky begs to offer
these superior Rods of prawsted Carbonzed Annealed
Iron, with Zinc Protectors and Eectroposye elements
combined in their manufacturer thus rendering them equal
TO copper as conductors They in tenee lengths with
brasscrew connecting JOINTS an enure
new style Of metallic patented attachments for brick or
frame buildings Also glass solaers of novel aud nge
NOUS construction (paiened) forming lock; the whole
mounted with solid platinum silver point (patented,)
twelve inches long, surrounded ut the base with three angu
lar negative magnets which the power to extra
most fearful thunderstorm and embrace the entire pere
ton Of science up to the present tme the whole consttu
ting the most magnificent and perfect silent conductor ever
presented to the public
ceent rods such low rates. the greatest attention has
been given to their construction TO be readily attached
The astonishing of the negative magnets in dschar
ing the air Of its opposite elements has been clearly demon
etraed by the Eectrometer, when unmagnetized 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 are hereby cautioned against laying yourselves
liable by purchasing Of those who are not authorized or
who substituting inferior limitations. All agents duly
appointed can show their certificates Have good rods OF
none. CHARLES w. HEiDOS,
Washington City
do hereby certify that have app lied various powerful
chemical reagents to sprat Patent Points for Lightning
Rods and that the results of these experiments convince
that they will resist the action of atmospheric and
thereby preserve the extremity sharpa condition
senal to protection against lightning The reagents used
diem, common sa acetc acid sulphurc acid and hydro
choric acid. With the first, there action on the
etal with the several acids, there very sga fact
Sufficient to show that atmospheric influences would have
no sensible effect
JOHN LEooNTE, Prof of Nat, Phil. ct Chem
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 RoBT. PETER.
LEXINGTON, KY February 20, 1885,
CHICAGO, September 8, 1850.
This may certify that have examined somewhat criti
cally james Sprats Patent Lightning Rods, and that
of opinion that constructed scientific principles For
combining durability, cheapness and efficacy, deem it
equal and think superior, TO other rod ever offered
for my inspection. Prof JAS v. Y. BLANEY.
AUGUSTA, (GA.) November IL, 1850.
This will certify that have examined the Lightning
Rods Metallic Points and Isolatng Attachments,
featured BY Mr. Spra and regard them constructed in
conformity the general laws of the electric uid and the
metallic compound constituting the Points, 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 III Smith,
of this city, the plan of Mr. Spra appear to to be
very well devised and point of mechanical construction
are the best have seen.
1t 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 are liable. r. SILIMAN, Jr,
Prof of Chem. in the University OF Louisville.
LOUISVILLE, January q, 1851.
All orders left at ANDREW DUFFYS Stove Mandatory
It'll street, will be promptly attended to; at GEORGE
BELLS, Alexandria, Va of King and st. Asaph ss
ap 14-f +84