Daily American telegraph., 1852-04-15
Protection from Lightning.

rINHE undersigned being the duly appointed Agent OF
NiSaRoD MANDATORY Coington Kentucky begs to offer
these superior Rods Sprawsted Carbonzed Annealed
IRON with Zinc Protectors and Electroposye elements
combined in their manufactured thus rendering them
70 copper as conductors They in tenee lengths with
accurately brass screw connecting Joints an entire
new style Of metallic (patented attachments for brick
frame buildings also, glass solaers of novel and nge
NOUS consfncaon, patentedO forming lock; the whole
mounted with solid platinum silver point patented
twelve inches long, at the base with three
lar negative magnets which possess the power
ordinary extent OF dschargng the opposite elements of the
most fearful Thunderstorm and embrace the entire perec
ton of science to the present time the whole constu
ting the most magnificent and perfect silent conductor
presented to the public.
Safety been compromised by aordng these ex-
ceent rods such low rates the greatest attention has
given their construction as TO be readily attached
The astonishing power OF the negative magnets in dscharg
ing the air its opposite elements has been clearly demon
by the Elecrometer when unmagnetzed points
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 or
who substituting inferior limitations All agents duly
none, CHARLES W. HEYDoN,
Washington City
do hereby certify that have applied various powerful
chemical reagents to Sprats 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
enta protection against lightning The reagents used
dunn, common sa acec acid suphuric acid and hydro
chloric acid With the first, there action the
metal; with the several acids there hg-a 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.. spratt offered to
well calculated to perform the office for which they
Hassaros s0 Rr i February 90 1850 0 0i
CHICAGO, September g. 1850.
This may certify that have examined, somewhat crit
cally james Sprats Patent Lightning Rods and that
opinion that is constructed scientific principles For
combining durability, cheapness, and efficacy deem II
equal and think SUPERIOR to any other rod ever offered
for my inspection. Prof. JAS. v. T. BLANEY.
AUGUSTA, (GA) November IL, 1850.
This will certify that have examined the Lightning
Rods Metallic Points and Isoating Attachments manu-
featured by Mr. Spra and regard them as constructed IN
conformity to the general laws of the electric ud and the
metallic compound constituting the Points, promising
the result Of several tests to which they submit
ted to resist for the action of those causes
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. Sprat appear to me to be
very well devised and point of mechanical construction
the best have
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. II. SILIMAN, Jr,,
Prof of Chem. in the University of Louisville
LOUISVILLE, January n, 1851.
All orders left at ANDREW DUFFYs Stove Mandatory
It'll street. will be promptly attended to- or at GEORGE
BELLS Alexandria, Va of King and St. Asaph SITS
ap lift