Daily American telegraph., 1852-07-16
Protection from Lightning.

undafSgned DelnB uAJ --oss-e ~
ROD MANUFAcToRY Coyngton, Kentucky begs to oer
these superior Rods of Spiral twisted CarDoneu
Iron with Protectors and Eecroposihye elements
combined in their manufactured thus rendering them equs
accurately fitted connecting joints an entire
new style Of metallic patented) attachments for brick or
NOUS construction ratentei1 forming lock; the whole
mounted With solid platinum silver point, (patented
lar negative magnets which possess bs to an extra
ordinary extent of dsehargng the opposite elements Of the
most fearful thunderstorm and embrace the entire perec
ton Of science mp TO the present me the whole consu
ting the most magnificent and perfect silent conductor
Safety has not compromised by aioriing these ox
elent rods at such low rates. the greatest attention has
heeD given tother to be readily attached
The astonishing power Of the negative magnets in dschag
ing the air of its opposite elements has been clearly demon
strated by the Eecrometer when unmsgneiHed 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
table, by purchasing of those who not authorized
who substituting inferior limitations. All agents duly
appointed can show their certificates Have good rods or
none. CHARLES w. HEYDON,
Washington City
do hereby certify that have app lied various powerful
chemical reagents to Sprats 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 shapa condition most
senta to protection against lightning The reagents used
in the above experiments solution of chloride of So
chlorc acid With the first, there action on the
metal with the several acids there very sga fact
sufficient TO show that atmospheric influences would have
no sensible effect
| JOHN LECoNTE, Prof. of Nat. Phil. ct Chem.
UNIVERSITY OF GA, October S, 1850.
The Lightning Conductors OF Mr. spratt offered to me,
well calculated to perform the office for which they
| intended Yours truly, Prof R0BT. PETER.
| LEXINGTON KY, February 20, 1850
| CHICAGO September 3, 1850.
This may certify that have examined, somewhat criti-
cally james Sprats Patent Lightning Rods and that
opinion that it is constructed scientific principles For
combining durability cheapness, and efficacy deem it
equal and think SUPERIOR to other rod ever offered
| for my inspection. Prof JAS " H. BbANEY.
| > AUGUSTA (GA) November II, 1850
| This will certify that have examined the Lightning
Rods Metallic Points and Isoating Attachments
actured by Mr. Sprat and regard them constructed in
conformity the general laws of the electric fluid and the
metallic compound constituting the Points, promising,
from the result of several tests to which they submit
to resist for years the action of those atmospheric
most likely to corrode them. A. MEANS,
Prof Phys Sc, 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 to be hoped that the of these Rods may become
general important auxiliary defence against danger
which must be regarded of ordinary magnitude, to
which all buildings are liable II. 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
ap 14n