Daily American telegraph., 1852-05-28
Protection from Lightning.

VNHE undersigned being the duly appointed Agent Of
SpRATT's ELEcrRIcAN AND ELECTRO LIGHT
these superior Rods of Carbonzed Annealed
iron with Zinc Protectors and Electropostye elements
combined in their manufacturer thus rendering them
m conner as conductors They in enfee lengths with
accuratey-fed brassscrew connecting joints, entire
new style Of metallic patented) attachments for brick
frame buildings also glass isoaters of novel and nge-
Nous construction, (patented forming lock- the whole
mounted with solid platinum silver point patented0
negative magnets which possess the power TO extra
ordinary exen of dchargng the opposite elements of the
fearful thunderstorm, and embrace the entire perec
ton of science up to the present times the whole consttu
ting the most magnificent and perfect silent conductor
presented to the public,
safety has not been compromised by aordng these ex
ceent such low rates. the greatest attention has
been given to their so as 70 be readily attached
The astonishing power of the negative magnets in dscharg
ing the air of its opposite elements mas been clearly demon
srated by the Eectrometer when unmagnetized points
have shown but slight results, though placed under the
same conditions fact they gather and silently discharge
electricity the atmosphere when you would scarcely
These improvements being secured by double letters pa
tent YOU are hereby cautioned against laying yourselves
liable by purchasing OF those VINO are no. authorized or
none. ChAhLEo W. HEfDoN,
Washington City.
do hereby certify that have app lied various powerful
chemical Reagents to Spras Patent Points for Lightning
Rods and that the results these experiments convince
that they will resist the action of atmospheric and
thereby preserve the extremity sharpa condition most
enta 10 protection against lightning The reagents used
the above experiments were solution OF chloride Of
dunn common salt acetc acid sulphurc acid, and by ro
chloric acid. With the FIRST there action the
metal with the several acids there very slg-a fact
sufficient to show that atmospheric influences would have
sensible effect
UNIVERSITY OF GA, October 8, 1850.
The Lightning Conductors of Mr. Spratt offered to me-
calculated perform the Office for which they
intended. Yours, truly, Prof R0BT. PETER.
LEXINGTON, KY. February 20 1850.
CHICAGO, September 8, 1850.
This may certify that have examined somewhat crit
caly, James Sprats Patent Lightning Rods and that am
OF opinion that 1t is constructed scientific principles For
durability, cheapness, and efficacy, deem 1t
equal and think SUPERIOR to other rod ever offered
for my inspection. Prof JAS. V. o. BLANEY.
AUGUSTA (GA) November IL, 1850
This will certify that have examined the Lightning
Rods, Metallic Points, and Isolating Attachments manu-
featured by Mr. Spra and regard them as in
to the general laws of the electric hud and the
metallic compound constituting the Points as promising
the result of several tests to which they submit
ted to resist for years the action of those causes
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,
this city, the plan of Mr. Sprat appear to me to be
well devised and in point of mechanical construction
are the best have ever seen.
1t be hoped that the of these Rods become
GENERAL important auxiliary defence against danger
hch must be regarded of ordinary magnitude to
v hich all buildings are liable. r. SILlMAN, Jr,
Prof of Chem. in the University Of Louisville.
LOUISVILLE, January 27 1851.
All orders left at ANDREW DUFFY's Stove Mandatory
til street. will be promptly attended to- at GEORGE
BELLS Alexandria, Va, corner of King and St Asaph ss
l4-tf