Daily American telegraph. [volume] (Washington [D.C.]) 1851-1852, 1852-10-18
Protection from Lightning.

,HE undersigned, being the duly appointed Agent Of
i spRATTs EIEcTRIcAN AND ELECTRO METAILURasT LIGHT
these superior Rods Of Spiral twisted Carbonzed Anealed
ron with Zinc Protectors and Eectroposiye elements
combined in their manufacturer thus rendering them equal
copper conductors They In tenee lengths with
accurately brassscrew connecting joints, entire
style of metallic patSnted attachments, for brick
frame buildings; ALSO glass solaters of novel and nge.
Nous construction, paented forming lock; the whole
twelve inches long at the base with three angn.
lar negative magnets which the power to extra
ordinary extent Of the opposite elements of the
most fearful Thunderstorm and embrace the entire perec
ton Of science up TO the present times the whole constu
ting the most magnificent and perfect silent conductor ever
Safety has not been compromised by aordng these
ceent rods at such low rates. the greatest attention has
been given tother as TO be readily attached
The astonishing the negative magnets In dscharg
ing the air of ts 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
These being secured by double letters pa
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 ceracates Have good rods
none. CHARLES w. HKYD0N,
Washington City.
chemical reagents to spras Patent Points for Lightning
Rods and that the results these experiments convince
thereby preserve the extremity sara condition most es.
sna 10 protection against lightning The reagents used
in the above experiments solution OF chloride of
dum common salt acetc acid suphuric acid and hydro
chloric acid With the first there action the
metal with the savera acids there very sha fact
sufficient to show that atmospheric influences would have
JOHN LEooNTE, Prof of Nat Phil ct Chem
UNIVERSITY OF Ca, October 8, 1850
The Lightning Conductors of Mr. spratt offered to me,
are well calculated TO perform the Office for which they are
LEXINGTON KY, February 20 1850.
CHICAGO, September 81 1891 [
This may certify that have examined, somewhat crit
cay, James spratts Patent Lightning Rods and that am
combining durability cheapness, and efficacy deem It
equal and think SUPERIOR 10 any other rod offered
for my inspection. Prof JAS. v. z. BLANEY.
AUGUSTA, (GA) November ii, 1850
This win certify that have examined the Lightning
Rods, Metallic Points and Isoating Attachments manu-
featured by Mr. Sprat and regard them constructed In
conformity the general laws Of the electric fud and the
metallic compound constituting the Points, promising,
the result Of several tests which they submit
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 M. Smith,
Of this CITY, the plan Of Mr. Sprat appear to me TO be
very well devised and In point Of mechanical construction,
are the best have
IL Is TO be hoped that the OF these hods may become
general important auxiliary defence against danger
which must regarded Of no ordinary magnitude, to
which all buildings are liable r. sItIMAN, Jr.,
Prof Of Chem. in the University Of Louisville
LOUISVILLE, January q, 1851.
An orders left at ANDREW DUFFYS Stove Mandatory,
eth street, will be promptly attended to- or at GEORGE
BELLS Alexandria, Va Of King and st. Asaph sts
ap1+n