Daily American telegraph., 1852-08-07
Projection from LIGHTNING.

'HE undersigned, being the duly appointed Agent o.
sPRArrs ELEcrRIcAs EIKcrRo MEfAILuaeisf Laaf-
NahoD MAsUrAcroRI, Covngton, Kentucky bes 70 onef
these superior Rods Of spatwised Carboniaed Annsaed
IRON with Zinc Protectors, and Eectropostys elements
combined In their manufactured thus rendering them equal
TO copper as conductors They i'm tent sngths With
new style Of metallic (patsnted attachments for brick
frame buildings also glass isoater Of novel and nge
mounted with solid platinum silver point (patentsd)
twelve inches long, surrounded ut tho base with three ang
lar negative magnets which possess the power 10 an extra
ordinary extent dschargng the opposite eemsns Of the
most fearful Thunderstorm and embrace the entire perec
ton OF science up 70 tne present time the whole eonsu
presented 10 the public,
Safety has not been compromised by aforng these
callent rods at such low rates. the greatest attention
given their construction 10 AZ 10 be readily attached
The astonishing power Of the negative magnets In dischar
ing the air OF Its opposite elements, has been clearly demon
strated by the Eecrometer when unmAgnetzed points
have shown but slight results, though placed under the
conditions In TACT they gather aud silently discharge
electricity from the atmosphere when you would scarcely
suspect any being present
These improvements being secured by double letters pa
tent you hereby cautioned against laying yourselves
liable by purchasing Of those who are not authorized or
who substituting inferior limitations All agents duy
appointed show their certificates Have good rods or
none. CHARLES w. HEYDON,
Washington City.
do hereby certify that have app lied various powerful
chemical reagents 10 Spratts Patent Points for Lightning
Rods and that the results of these experiments convince
that they will resist the action of atmospheric and
thereby the extremity sharpa condition most es-
sentia to protection against lightning The reagents
in the above expermens were solution of chloride Of 20.
dium common sat acetc acid suphuric acid, and hydro
chorc acid With the first, there action the
metal with the several acids there very sta fact
sufficient to show that atmospheric influences would have
no sensible effect .##.
JOHN LECoNTE, Prof Of Nat Phil ct Chem.
UNIVERSITY OF GA, October y, 1860.
The Lightning Conductors of Mr. Spratt, offered o
well calculated to perform the Office for Which they are
intended. Yours, truly, Prof. hOBT. PETER.
LEXINGTON, KY, February 20, 1850
CHICAGO, September 3, 1850
This may certify that have examined, somewhat crit
aalu "a atant
of opinion that Is constructed ON scientific principles For
combining durability, cheapness, and efficacy deem u
equal and think superior to any other rod ever offered
for my inspection Prof. JAS. v. H. BLANEY
AUGUSTA, (GA) November IL, 1850
This will certify that have examined the Lightning
Rods, Metallic Points, and lsoating Attachments manu-
featured by Mr. Spratt and regard them constructed In
conformity the general laws of the electric fluid and the
metallic compound constituting the Points, promising
the result of several tests TO which they submit
resist for years the action of those atmospheric
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 NJ. Smith
of this city, the plan Of Mr. Spra appear to to be-
very well devised and in point of mechanical construction
are the best have
1t is to be hoped that the Of these Rods become
general important auxiliary defence against danger
which be regarded of ordinary magnitude, To
which all buildings are liable r. SILIMAN, Jr.,
Prof of Chem. in the University Of Louisville
LOUISVILLE, January q, 1851.
All orders left Mt ANDREW DUFPY'S Stove Mandatory
BELLS Alexandria, Va, of King and St Asaph SITS
an l-t