Daily American telegraph. [volume] (Washington [D.C.]) 1851-1852, 1852-04-23
Protection from Lightning.

THE undersigned being the duly appointed Agent Of
SPRATTs ELECTRICIAN AND LIGHT
Isd-RoD MANDATORY Covngton, Kentucky begs offer
these superior Rods of Sprawsed Carbonized Anneaed
Iron with Zinc Protectors and Elecropostiye elements
combined in their manufactures thus rendering them equal
to copper conductors They in eneet lengths with
brass screw connecting Joints an entire
style OF metallic (patened) attachments for brick
frame budings also, glass isoaters of novel and inge
Nous construction patented forming lock- the whole
mounted with solid platinum silver point, patented
inches long, surrounded at the with three
lar negative magnets which the power to extra
fearful embrace the entire perfec
ton of science up to the present times the whole consu
ting the most magnificent and perfect silent conductor
presented to the public. u
Safety has not been compromised by aordng these
ceent rods at such low rates. the greatest attention has
given their construction to readily attached
The astonishing power OF negative magnets In dchar
atraed 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 ~ 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
none. CHARLES W. HEYDoN,
Washington City.
do hereby certify that have app lied various powerful
chemical reagents to sprats Patent Points Lightning
and that the results Of these convince
that they will resist the action of atmospheric causes and
thereby preserve the extremity sharpa condition most
senal protection against lightning The used
dunn, Common acetic acid sulphurc acd and hydro
chloric acid. With the rst there action the
metal with the several acids, there very 0a fact
sufficient to show that atmospheric influences would have
sensible effect. @
JOHN LECONTE. Prof of Nat Phil. ct Chem.
UNIVERSITY OF GA October s, 1850
The Lightning Conductors of Mr.. Sprat offered to me-
well calculated to perform the Office for which they
intended Yours, truly, Prof ROBT. PETER.
LEXINGTON, KY, February 20, 1850.
CHICAGO, September 8, 1850.
This may certify that have examined somewhat crti
rally i0ht Rode
Of opinion that constructed scientific principles For
combining durability, cheapness and efficacy, deem it
equal and think superior to any other rod offered
for my inspection. Prof JAS V. q. BLANEY.
AUGUSTA, (GA.) November IL, 1850.
This will certify that have examined the Lightning
Rods Metallic Points, and Isolang Attachments,
featured by Mr. Spra and regard them constructed in
conformity the general laws of the electric fluid
metallic compound constituting the Points promising,
from the result of several tests to which they submit
ted to resist for years 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,
of this city, the plan of Mr. Spratt appear be
very we'll devised; and in point Of mechanical construction
are the best have
Is to be 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. SILIMAN, Jr,
Prof Of Chem. in the University Of Louisville.
LOUISVILLE January q, 1851
All orders left at ANDREW DuFFYs Stove
It'll street, will be promptly attended to; at GEORGE
BELLS Alexandria, Va of King and ST. Asaph SITS
lift