Daily American telegraph., 1852-04-26
Protection from Lightning.

VHE undersigned being the duly appointed Agent of
SPRATTs ELECTRICIAN AND ELECTRO METALLURGisT LIGHT
RoD MAsuFAcToRY Coyngton Kentucky begs to offer
these superior Rods of Spratwsed Carbonzed Anneaed
Iron with Zinc Protectors and Electroposye elements
combined in their manufacturer thus rendering them equal
copper conductors They In eneet lengths with
brass screw connecting Joints an entire
style Of metallic (patened attachments for brick
frame buildings also, glass solaters of novel and inge
NOUS construction, (patentedD forming lock- the whole
mounted with solid platinum silver point (patented
inches long, surrounded at the base with three
lar negative magnets which the power extra
ordinary extent of the opposite elements of the
fearful Thunderstorm embrace entire perec
ton of science up to the present time; the whole consit
ting the most magnificent and perfect silent conductor
presented to the public.
Safety has not been compromised by aording these
ceent rods at such low the greatest attention has
been given their construction to be readily attached
The astonishing power OF the negative magnets in dschar
ing the air Of opposite elements has been clearly demon
strated 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
tent you hereby cautioned against laying yourselves
table, by purchasing of those who 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 Sprata 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 most
ental to protection against lightning The reagents used
In were OF
dum Common acetic acid sulphurc acid and hydro
chloric acid. With the first there action the
meta with tho several acids there very Sights 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, Prot. .ROBT. PETER.
LEXINGTON, KY, February 20, 1850.
CHICAGO, September g. 1850.
This may certify that have examined, somewhat crt
cally James spratts Patent Lightning Rods and that
of opinion that is constructed scientific principles For
combining durability, chedpness and efficacy, deem it
equal and think superior. to other rod offered
for my inspection. Prof JAS V. 2. BLANEY.
AUGUSTA, (GA.) November IL, 1850.
This will certify that have examined the Lightning
Rods Metallic Points, and lsolang Attachments, manu-
featured by Mr. Sprat and regard them constructed In
conformity to the general laws of the electric fluid and the
from the result of several 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,
of this city, the plan of Mr. Spra appear to me to be
well devised and in point of mechanical construction
are the best have
1t is be hoped that these Rods may become
general important auxiliary defence against danger
which must be regarded of ordinary magnitude to
which all buildings are liable. II. SILlMAN, Jr,
Prof of Chem. in the University of Louisville.
LOUISVILLE January q, 1851
All orders left at ANDREW DUFFYS Stove Mandatory
18th street. will be promptly attended to; Mt GEORGE
BELLS Alexandria, Va of King and ST. Asaph sts
ap 14-tf