Daily American telegraph., 1852-04-21
Protection from Lightning.

TNHE undersigned being the duly appointed Agent OF
Nd-RoD MASuFAcroRr Covington Kentucky begs offer
these superior Rods OF Carbonized Annealed
Iron with Zinc Protectors and Electropoye elements
combined In their thus rendering them equal
70 copper as conductors They In teneet lengths with
brass connecting joints an entire
new style Of metallic (patened attachments, FOR brick or
frame pudngs ALSO glass isolaters OF novel and inge
NOUS construction (patented forming lock; the whole
mounted with solid platinum silver point lpatentedD
twelve inches long at the base with three
lar negative magnets which possess the power TO an extra
ordinary extent Of dschargng the opposite elements OF the
most fearful Thunderstorm and embrace the entire perec
ton OF science to the present time; the whole cons
ting the most magnificent and perfect silent conductor ever
Safety has not been compromised by aording these
ceeat rods at such low rates. the greatest attention has
been given their construction be readily attached
The astonishing power of the negative magnets IN discharg
ing the air opposite elements has been clearly demon
srated by the Eecrometer, 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.
THESE improvements being secured by double letters
tent you hereby cautioned against laying yourselves
liable, by purchasing those who not authorized
who are substituting inferior limitations. All agents duly
appointed can show their certificates Have good rods
none. I CHARLES w. HEYDON,
Washington City
do hereby certify that have app lied various powerful
chemical reagents spratta Patent Points for Lightning
ana that the results Of these experiments convince
that they Will resist the action Of atmospheric and
thereby preserve the extremity shara condition most
senal TO protection against lightning The reagents used
III experiments solution chloride OF
duni Common SALT acec acid, suphuric acid and hydro
chlorc acid With the first, there action the
meta with the several acids there very sga fact
sufficient to show that atmospheric influences would have
no sensible effect
oHNLECoNTE, Prof of Nat Phil. ct Chem.
UNIVERSITY OF Ga, October 8, 1850
The Lightning Conductors Of Mr. Spratt, offered to me-
arc well calculated to perform the Office for which they
intended Yours, truly, Prof ROBT PETER.
LEXINGTON, Ky, February 2O 1850.
al. W CHICAGO, September s. 1850.
This may certify that have examined, somewhat crt
caly James Spratts Patent Lightning Rods and that
combining durability cheapness, and efficacy deem it
equal and think SUPERIOR to any other rod offered
for my inspection. Prof. JAS. v. T. BLANEY.
AUGUSTA (GA.) November H. 1850.
This will certify that l have examined the Lightning
Rods, Metallic Points, and Isoating Attachments,
featured by Mr. Spratt and regard them constructed in
conformity to the general laws of the electric fluid and the
from the result of several which they submit
ted to resist for the action of those atmospheric
most likely to corrode thom. 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. Sprat appear to be
very well devised and In point of mechanical construction
are the best have
is to be hoped that the of these Rods may become
which must be regarded of ordinary magnitude
which all buildings are liable r. SILIMAN, Jr,
Prof. of Chem. in the University of Louisville
LOUISVILLE, January a. 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 SITS
ap lift