Daily American telegraph. [volume] (Washington [D.C.]) 1851-1852, 1852-09-23
Protection from Lightning.

rJ,HE undersigned being the duly appointed Agent CT
SPRATTs ELEcTRIcL ELECTRO METAILURaIsT LIGHT
NNaRoD MANDATORY Coyington Kentucky begs to offer
these superior Rods Of Carbonzed Anneaiea
IRON with Zinc Protectors and Electroposve elements
combined in their manufacture thus rendering them equal
to copper conductors They are In teneet lengths wn
accurately fitted brass connecting joints an ene
style of metallic paented attachments, for brick or
frame buildings; ALSO glass olaers OF novel and lnge
NOUS construction (patened0 forming lock; the whole
mounted with solid platinum silver point, lpatented)
twelve inches long at the base with three angu
lar negative magnets which possess the power to an extra
ordinary extent of dscharng the opposite elements OF the
most fearful Thunderstorm embrace the entire perf
ton e science up to the present tme the whole constt
ting the most magnificent and perfect silent conductor ever
presented to the public #....
Safety has not been compromised by aording these
ceent rods at such low rates. the greatest attention has
given to their TO be readily attached
The astonishing of the negative magnets In dschar
ing the air Of opposite elements has been clearly
srated by the Electromeer, when unmngnetised 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
teu 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 or
none. ChAhLES W. hEfDON,
Washington City.
hereby certify thae have app lied various powerful
chemical reagents to SPIRITS Patent Points for Lightning
Rods and that the results these experiments convince
that they will resist the action Of atmospheric causes and
thereby preserve extremity sarpa condition most es
sena to protection against lightning The reagents used
dum common salt acetic acid suphuric acid and hydro.
chloric acid. With the first there no action on the
metal; with the several aeds there was very Sga fact
sufficient show that atmospheric Influences would have
no sensible effect.
JOHN LEcoNTE, Prof of Nat Phil. etChem.
UNIVERSITY Ga, October s, 1850.
The Lightning Conductors of Mr. Spratt, offered to me,
are well calculated to perform the Office for which they
intended Yours truly, Prof R0BT. PETER.
LEXINGTON, KY, February 90 1850
CHICAGO, September Q, $780,
This may certify that have examined, somewhat crit-
caly James spratts Patent Lightning Rods and that am
opinion that II Is constructed scientific principles For
combining durability chespness, and efficacy deem II
equal and think superior to any other rod ever offered
for my inspection. Prof JAS. v. 2. DLANEY.
AUGUSTA, (GA) November II, 1850
This will certify that have examined the Lightning
Rods Metallic Points and 1soating Attachments, manu-
featured by Mr. spra and regard them constructed In
conformity general laws of the electric uid and the
metallic compound constituting the Points, as promising,
the result Of several tests 10 which they we're submit
ted resist years the action Of those atmospheric causes
most likely To corrode them. A. MEANS,
Prof Phys &c., Emory College, Ga and Prof. Chem ana
Pharm. Medical College, Ga.
The Lightning Conductors put up by Mr. Henry NJ Smith,
this CITY, the plan Of Mr. Sprat appear 10 me 70 DE
very well devised and in point Of mechanical CONSTRUCTOR
the best have ever seen. -, -,
II Il to be hoped that tn. OF these Rods may become
general as an auxiliary defence against danger
which must be regarded Of no ordinary magnitude 10
uhicb ali buildings are liable. r. sILIMAH, Jr.,
prof of Chem in the University Of Louisville:
LOUISVILLE, January n, 1851.
All order. left At ANDREW DUFFYs Stove Mandatory,
eth street. will be promptly attended to- at dE0kak
BELLS Alexandria, Va corner Of King and st. Asaph sts
an l4-H