Daily American telegraph. [volume] (Washington [D.C.]) 1851-1852, 1852-09-28
Protection from Lightning.

rENHE undersigned being the duly appointed Agent Il
SPRATT'g ELECTRICIAN ELECTRO METALLuRGsT LIGHT
NNaRop MANDATORY Coyngton, Kentucky begs to offer
these superior Rods sprawistcd Carbonized Anneaed
Iron with Zinc Protectors and Eectropositve elements
combined in their manufacture; thus rendering them equal
copper conductors They in teneet lengths with
accurately tted brassscrew connecting joints, entire
new style of metallic patented attachments for brick
frame buildings also, glass isoaters of novel and inge-
Nous construction (atcnted forming lock; the whole
mounted with solid platinum silver point, (patented)
twelve inches long, surrounded at the base with three angu
lar negative magnets which possess the power an extra
ordinary extent Of dchargng the opposite elements Of the
most fearful Thunderstorm and embrace the entire pertec
ton Of science to the present tme the whole consttu
ting the most magnificent and perfect silent conductor
presented TO the public.
Safety has not been compromised by aordng these
ceent rods at such low rates the greatest has
been given their construction to be readily attached
Tho astonishing power Of the negative magnets in discharg
ssted by the Eectroneter when anmagnetiaod points
have shown but slight results though placed under the
conditions In fact they gather and silently discharge
electricity from the atmosphere when would scarcely
suspect any being present
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 spratts 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 sharpa condition most
enal to protection against lightning The reagents used
the above experiments solution OF chloride
dunn, common salt) acotc acid suphuc acid and hydro
chloric acid. With the first, there action the
metal with the several acids there very Sg-a fact
sufficient TO show that atmospheric influences would have
sensible effect.
JOHN LECoNTE Prof of Nat. Phil. etChem
UNIVERSITY Of GA, October 8, 1850.
The Lightning Conductors of Mr. spratt offered to me-
well calculated to perform the office for which they are
intended Yours truly, Prof R0BT. PETER.
LExISoroS Ky, February 20, 1850.
CHICAGO September 3, 1850.
This may certify that have examined somewhat criti
csy, james sprat5 Patent Lightning Rods and that
Of opinion that IL is constructed scenfc principles For
combining durability, chcspness and efficacy, deem IL
equal and think superior, TO any other rod offered
for my inspection Prof JAS. " 2. BLANEY.
AUGUSTA, (GA.) November II, 1850.
This will certify that have examined the Lightning
Rods, Metallic Ponts and Itolatng Attachments,
featured by Mr. Spra and regard them constructed in
conformity the general laws Of the electric fluid and the
metallic compound constituting the Points promising,
from the result tests TO which they submit
most likoly TO corrode them A. MEANS,
Prof Phys. &C.. Emory College, Ga, and Prof Chem and
Pharm, Medical College, Ga.
The Lightning Conductors put by Mr. Henry NJ Smith,
Of this CITY, the plan Of Mr. sprat appear to to be
very well devised and In point of mechanical construction,
are the best have
II IL 10 be hoped that the of these Rods may become
general ne mn important auxiliary defence against danger
which DO regarded OF ordinary magnitude to
which all buildings are liable. X. SILIMAN, Jr,
Prof. Of Chem. in the University Of Louisville.
LOUISVILLE, January II, 1851.
All orders left at ANDREW DUFFYs Stove Mandatory,
7th street, will be promptly attended to; at GEORGE
BELLS, Alexandria, Va Of King and st. Asaph sts