Daily American telegraph., 1852-10-16
Protection from Lightning.

V,HE undersigned, being the duly appointed Agent Of
NNaoD MASurAcToRr, Covington Kentucky begs to offer
these superior Rods Spiral twisted Annealed
Iron with Zinc Protectors and Electroposye elements
combined In their manufacturer thus rendering them equal
TO copper conductors They are In tenee lengths with
new style Of metallic paented atachments for brick or
frame buildings also, glass solaers OF novel and nge
Nous construction Psten,sd forming lock- the whole
twelve inches long, surrounded at the base with three ang
lar negative magnets which the power to an oxtrs
most fearful Thunderstorm and embrace the entire perc
ton Of science up TO the present tme the whole constn
ting the most magnificent and perfect silent conductor
presented TO the public
Safety has not been compromised by aording these ea
been given to their construction as Co be readily attached
The astonishing Of the negative In dischag
ing the air Of Its opposite elements has been clearly demon
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 n
These improvements being by double letters pa.
tent you hereby cautioned against laying yourselves
liable by purchasing those who not authorised or
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 spratfs 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 SHARPE condition most
senal to protection against lightning The reagents used
dunn common SALT acetc acid suphuric acid and hydro
chlorc acid With the first, there action the
METAL with the several acids there very sga fact
sufficient 70 show that atmospheric influences would have
sensble effect.
JOHN LEcoNTE, Prof Of Nat Phil. Chem.
UNIVERSITY or Ga, October 8, 1850. ..
The Lightning Conductors Of Mr. sprstt offered 10 me,
well calculated TO perform the Office for which they
intended Yours, truly, Prof RoBT. PETER
LEXINGTON, XII, February 20, 1850.
CHICAGO, September 8, 1851
This may certify that have examined, somewhat crit.
csy James sprstts Patent Lightning Rods and that am
Of opinion that II IL constructed scientific principles For
combining durability, chespness, and efficacy deem II
equal and think SUPERIOR TO any other rod offered
for my inspection. Prof JAS. v. Q. BLANEY.
AUGUSTA, (GA) November IL, 1850
This will certify that have examined tho Lightning
Rods, Metallic Points, and Isolating Attachments,
featured by Mr. spra and regard them constructed IN
conformity TO the general laws Of the electric fluid the
metallic compound constituting tho POINTS promising,
from the result OF several tests TO which they submit
ted TO resist for years the action Of those atmospheric
most likely 10 corrode them. A. MEANS
Prof Phys &c. Emory College, Ga and Prof Chem. and
Phsrm. Medical College, Ga.
The Lightning Conductors put up by Mr. Henry NJ. Smith,
Of this city, the plan OF Mr. Sprat appear to bs
very well DEVISED and In point Of mechanical construction,
the best have seen
be hoped that the Of these Rods may become
which must be regarded Of ordinary magnitude, TO
which all buildings are liable r. SILIMAN, Jr,
Prof Of Chem. In the University Of Louisville
LOUISVILLE, January ~, 1851.
All orders left at ANDREW DUFFY'S Stove Manufactory
9TH street. will he promptly attended to- at GEORGE
BELLS Alexandria, Va Of King and st. Assph sts
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