Daily American telegraph., 1852-10-01
Protection from Lightning.

FENHE undersigned, being the duly appointed Agent
spRATT's ELECTRICIAN ELECTRO METAILuRGIsT AeHr
NNeRoD MANuFAcToRI Covingtop Kentucky begs offer
these superior Rods of spirawed Carbonzed Annealed
Iron with Zinc Protectors, and Electroposye elements
combined in their manufacturer thus rendering them equ0l
copper conductors They In tenet lengths with
accurateytted brassscrew connecting joints entire
style of metallic (patene attachments for brick
frame budings also, glass isolaters, Of novel and tnge
NOUS construction, (patented forming lock- the whole
mounted with solid platinum silver point (patentedD
twelve inches long, surrounded at the base with three
lar negative magnets which possess the power to an extra
ordinary extent Of dchargng the opposite elements of the
most fearful thunderstorm and embrace the entire perec
ton science up to the present time the whole constitu
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 be readily attached
The astonishing power of the negative magnets in dcbar
strated by the Escrometer when unmagnetised points
have shown but slight results though placed under the
same conditions In fact they gather and lenty discharge
electricity from the atmosphere when you would scarcely
suspect any being present.
These improvements being secured by double letters pa.
tent you are hereby cautioned against laying yourselves
liable by purchasing Of those who not authorized or
who substituting inferior limitations All agents duly
appointed can show their Certificates lave good rods
none. CHARLES W. HEYDoN,
Washington City.
do hereby certify that have app lied various powerful
chemical reagents SprAtts Patent Points for Lightning
Rods and that the results Of these experiments convince
that they will resist the action Of atmospheric causes
thereby preserve the extremity sharpa condition es
sentia TO protection against lightning The reagents used
i
dium, common SALT acec acid sulphurc acid and hydro
choric acid With the first, there action on the
metal; with the several acids, there very sga fat
sufficient to show that atmospheric influences would have
sensible effect
JOHN LEcoNTE Prof Of Nat. Phil. stChem
UNIVERSITY or Ga, October 8, 1850.
The Lightning Conductors Of Mr. spratt offered 70 me-
we'll calculated TO perform the Office for which they
intended, Yours, truly, Prof R0BT, PETER.
LEXINGTON, XII, February 20, 1850.
CHICAGO, September 3, 1880
This may certify that have examined somewhat crti
combining durability, cheapness and efficacy, deem IL
equal and think superior, TO any other rod offered
for my inspection. Prof JAS V. 2. BLANEY.
AUGUSTA, (GA.) November IL, 1850.
This will certify that have examined the Lightning
Rods Metallic Points, and Isolating Attachments
featured by Mr. Spratt, and regard them constructed
conformity TO the general laws OF the electric fluid and tie
metallic compound constituting the Points promising
from the result Of several tests to which they submit
ted to resist for years the action Of those atmospheric
most likely to corrode them. A.MEANs,
Prof Phys &C., Emory College, Ca 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. Spratt appear to 10 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. r. SILIMAN, Jr.,
Prof Of Chem In the University If Louisville.
LOUISVILLE January n, 1851.
All orders left at ANDREW DUFFY's Stove Mandatory
9TH street. will be promptly attended to; or at GEORGE
BELLS Alexandria, Va, corner of King and st. Aph
ap 14--tf