Daily American telegraph. [volume] (Washington [D.C.]) 1851-1852, 1852-09-22
Protection from Lightning.

1HE undersigned, being the duly appointed Agent OF
SpRATTs ELECTRICIAN ELECTRO METAILuRoIsT LIdHT-
NdRoD MANUFAoToRr Covngton, Kentucky, begs to offer
these superior Rods of Sprwsted Carbonized Annealed
Iron with Zinc Protectors and Eectropositiye elements
combined in their manufacture; thus rendering them equal
copper conductors They In tenfeet lengths with
style of metallic patented attachments for brick
frame buildings ALSO glass isoater Of novel and ngA
mounted with solid platinum silver point (patented)
twelve inches long, surrounded at the base with three ang
lar negative magnets which possess the power to an extra
ordinary extent schargng the opposite elements Of the
most fearful thunderstorm, and embrace the entire perec
ting the most magnificent and perfect silent conductor ever
presented to the public.
Safety compromised by afording these
ceent rods at such low the greatest attention has
been given their to be readily attached
The astonishing of the negative magnets in dischar
Ing the air of its opposite elements has been clearly demon
strated by the Eectrometer when unmagnetzed points
have shown but slight results though placed under the
same conditions In fact they gather and silently discharge
electricity from the atmosphere when you would scarcely
suspect any being present.
tent you hereby cautioned against laying yourselves
liable by purchasing Of those who not authorized or
who substituting inferior limitations. All agents duly
appointed can show their cercstes Have good rods or
none. CHARLES w. HEYDoN,
Washington City.
hereby certify that have app He'd 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 es
enal 10 protection against lightning The reagents used
In the above experiments solution OF chloride OF So
dum, common SALT acetic acid suphuric acid and hydro
ohloric acid. With the first, there action the
metal with the several acids there very sgha fact
sufficient TO show that atmospheric influences would have
no sensible effect.
JoHNLEooNTE, Prof OF Nat Phil ct Chem.
UNIVERSITY OF Ga, October 8, 1850.
The Lightning Conductors of Mr. spratt, offered to me,
well calculated perform the Office for which they
intended Yours truly, Prof. R0BT. PETER.
LEXINGTON, XII, February 20, 1850.
CHICAGO, September ., 1850.
This may certify that have examined, somewhat criti
cay, James spratts Patent Lightning Rods and that
Of opinion that II Is constructed scientific principles For
combining durability, cheapness, and efficacy, deem II
equal aud think SUPERIOR TO any other rod offered
Tor my inspection. Prof JAS. V. z. BLANEY.
AUGUSTA, (GA) November II, 1850.
This will certify that have examined the Lightning
Rods, Metallic Points, and lsolating Attachments,
featured by Mr. Sprat and regard them constructed in
conformity the general laws Of the electric fluid and the
from the result several which they submit
ted 10 resist for years the action Of those atmospheric
most likely to corrode them. A. MEANS,
Prof Phys. Sc Emory College, Ga, and Prof Chem ana
Phnrm, Medical College, On.
The Lightning Conductors put up by Mr. Henry Smith,
Of this city, the plan Of Mr. Sprat appear TO me 70 be
very we'll devised and in point Of mechanical construction,
the best have seen.
1t IL to be hoped TINT the Of these Rods may become
general as an important auxiliary defence against danger
which be regarded OF ordinary magnitude, 70
whiob All buildings are liable. X. sILIMAN, Jr,
Prof Of Chem. in the University Of Louisville.
louisville, January q, 1851.
All orders left at ANDREW DUFFYs Stove Mandatory,
eth street. will be promptly attended 70; at GEORGE
BELLs Alexandria, Va Of King and St. Amph sits.
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