Daily American telegraph., 1852-05-21
Protection from Lightning.

INHE undersigned being che duly appointed Agent OF
ROD MAsuFA0roRr Cosngton, Kentucky, begs 70 oer
these superior Rods Of carbonised Annssed
with Zine Protectors and Elecroposiuye elements
combined In their manufactured thus rendering them equal
tooopper conductors They are in lengths with
style Of metallic (patented attachments for brick or
frame buildings also, glass isoaters OF novel and inge
NOUS construction, patented forming lock- the whole
mounted with solid platinum silver point (patented)
twelve inches long at the base with three
lar negative magnets which possess the power TO extra
ordinary dischargng the opposite elements the
fearful thunderstorm, and embrace the entire perec
ton science up to the present time; the whole const
ting the most magnificent and perfect silent conductor
presented to the public.
Safety has not been compromised by aording these
ceent rods at such low rates. the greatest attention has
been given to their construction readily attached
The astonishing of the negative magnets in dschar
ing the air of its opposite elements been clearly demon
strated by the Eectrometer, when unmagnezed points
have shown but slight results though placed under the
conditions In fact they gather silently discharge
electricity from the atmosphere when would scarcely
These being secured by double letters pa
tent hereby cautioned against laying yourselves
S G nose ss n d
none. CHARLES w HEfDoN,
Washington City.
do hereby certify that have app lied various powerful
chemical reagents Spratts Patent Points for Lightning
Rods results OF these experiments convince me
that they will resist the action of atmospheric causes and
thereby preserve extremity harpa condition most
scntia protection anst lightning The reagents used
in above experiments solution of chloride Of so
!
choric 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.
JOHN LECONTE. Prof of Nat PHI. ct Chem
UNIVERSITY GA, October g. 1850.
The Lightning Conductors of Mr. spratt, offered to me-
well calculated to pero 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 crit
cally Spratts Patent Lig hnng Rods and that
opinion that Ii Is constructed scientific principles For
combining durability, cheapneis, and efficacy, deem it
equal and think superior to any other rod offered
for my inspection. Prof JAS. v. r. BLANEY
AUGUSTA, (GA) November IL, 1850
This will certify that have examined the Lightning
Rods Metallic Points Isolating Attachments manu-
featured by Mr. Spra and regard them constructed in
conformity the general laws Of the electric d and the
metallic compound constituting the Points, promising
from the result of several tests to which they submit
ted resist years the action of those atmospheric
most likely to corrode them. A. MEANS, I.
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. Sprat appear to be
very well devised and in point Of mechanical construction
are the best 1 have
1t hoped that the of these Rods may become
which must be regarded Of ordinary magnitude, to
which all buildings liable. r. SILIMAN, Jr.,
Prof of Chem. in the University of Louisville
LOUISVILLE, January n, 1851.
All orders left at ANDREW DUFFYS Stove Mandatory,
It'll street. will be promptly attended to; at GEORGE
BELLS Alexandria, Va Of King and St. Asaph sts
ap 14-tf