Daily American telegraph., 1852-09-25

HE undersigned, being the duly appointed Agent Ct
SPRATTs ELECTRICIAN ELECTRO METAILURGIsT LIGHT
NoRoD MANDATORY Covington Kentucky, begs to offer
these superior Rods, of spirawsed Carbonized Anneaed
Iron with Zinc Protectors, and Electroposve elements
combined in their manufactured thus rendering them equal
copper conductors. They are in eneet lengths with
accurately fitted connecting JOINTS entire
style of metallic paented attachments for brick
frame buildings also glass isolaters of novel and inge
mounted with solid platinum silver point, (patented)
twelve inches long, surrounded at the base with three
ordinary extent dschargng the opposite elements of the
most fearful Thunderstorm and embrace the entire perfec
ton OF science up to the present time the whole constu
ting the most magnificent and perfect silent conductor
presented to the public.
Safety has not been compromised by aordng these
cent rods ct such low rates the greatest attention has
been given their to be readily attached
The astonishing power of the negative magnets in dcharg
sfated by the Eeetrometer 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
tent You are 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. HEYD0N,
Washington City.
hereby certify that have app lied various powerful
chemical reagents to sprns Patent Points for Lightning
Rods and that the results Of these experiments convince
that they will resist the action of atmospheric causes and
thereby preserve the extremity shapa condition most
sentia 10 protection against lightning The reagents used
the above experiments solution of chloride
dunn common sat acec acid sulphurc acid and hydro
chlorc acid With the first, there action the
metal with the several acids, there very sa fact
sufficient to show that atmospheric influences would have
sensible effect
JOHN LECoNTE Prof OF Nat Phil etChem
UNIVERSITY OF GA, October s, 1850.
The Lightning Conductors of Mr. spratt offered to me,
are well calculated perform the Office for which they are
intended. Yours, truly, Prof R0BT. PETER
LEXINGTON, KY, February 20, 1850.
CHICAGO, September 3, 1850.
This may certify that have examined somewhat cr-
cay, James Spratts Patent Lightning Rods, and that
Of opinion that IL Is constructed scientific principles For
combining durability, cheapness and efficacy, deem Il
equal and think SUPERIOR 10 any other rod offered
for my inspection. Prof JAS. V. T. BLANEY.
AUaUsTA, (GA.) November IL, 1880
This will certify that have examined the Lightning
Rods Metallic Points and Isoating Attachments
featured by Mr. spratt and regard them constructed in
conformity the general laws Of the electric ud 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 Sc 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 in point mcdaniel construction,
are the best have
1t IL be hoped that the Of these Rods may become
general as an important auxiliary defence against danger
which be regarded OF no ordinary magnitude, o
which all buildings are liable. r. sILlMAN, Jr,
Prof Of Chem in the University Of Louisville
LOUISVILLE, January ~, 1851.
All orders left at ANDREW DUFFYs Stove Mandatory
eth street. will be promptly attended to- GEORGE
BELLS Alexandria, Va corner Of King and st. ASaph SITS
l1-tf