Daily American telegraph., 1852-05-13
Protection from Lightning.

1NHE undersigned, being the duly appointed Agsn. %
SPRATTs ELECTRICIAN AND ACKNOWLEDGEMENTS auat-
NiSRoD MASUPAoroRr Covngton, Kentucky begs TO oer
these superior Rods of Spratwisted Carbozed anneae
Iron, with Zinc Protectors, and Eectroposuse eeents
combined in their manufacturer thus rendering them equal
to copper conductors They are In teneet Win
accurately fitted connecting JOINTS an entire
new STYLE Of metallic paented attachments, for brick
frame buildings also, glass solaters OF novel and nge-
Nous construction (patentedO forming lock- the whole
mounted with a solid platinum silver point patented
twelve long, surrounded at the three
lar negative magnets which possess the power
ordinary extent dchargng the opposite elements
fearful thunderstorm, and embrace the entire perec
ton OF science up the present time; the whole consu-
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 to be readily attached
The astonishing power Of the negative magnets dschar
ing the air OF its opposite elements has been clearly demon
srated by the Elecrometer when unmagnetzed points
have shown but slight results though placed under the
eae IN iaot ey gatner ana senIy
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
table, by purchasing Of those who not authorized or
who substituting inferior limitations. All agents duly
n nome ''' 'AO" 'D''' CHARLES W nEYDoS, "
Washington City
do hereby certify that have app lied various powerful
chemical reagents to 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 most
sena TO protection against lightning The Reagents used
in the above experiments solution Of chloride of
dunn, common sa acec acid suphuric acid, and hydro
choric acid. With the first, there action the
metal; with the several acids there very sa fact
sufficient to show that atmospheric influences would have
no sensible effect
JOHN LECoNTE. Prof. of Nat Phil ct Chem.
UNIVERSITY OF GA, October 8, 1850
The Lightning Conductors of Mr.. spratt offered to me-
well calculated to perform the office for which they
intended. Yours, truly, Prof ROBT PETER
LEXINGTON, KY. February 20, 1850.
CHICAGO, September 8, 1850
This may certify that have examined, somewhat crit
cally James sprats Patent Lightning Rods and that
of opinion that 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. ". q BLANEY
AUGUSTA, (GA.) November II, 1850.
This will certify that have examined the lightning
Rods Metallic Points, and Isolating Attachments, manu-
featured by Mr. Sprat and regard them constructed il
conformity the general laws of the electric fluid and the
from the result of several tests to which they submit
ted to resist for years the action Of those
most likely to corrode them. A. MEANS
Prof Phys. &c., Emory College, Ga and Prof Chem
Pharm. Medical College, Ga.
The Lightning Conductors put up by Mr. Henry NJ Smith
of this city, the plan of Mr. Sprat appear to to bt
very well devised and In point Of mechanical construction
are the best have seen.
IL is to hoped that the of these Rods may become
general important auxiliary defence against danger
which must be regarded as of ordinary magnitude 10
which all buildings are liable. r. SILIMAN Jr.,
Prof of Chem. in the University Of Louisville.
LOUISVILLE, January q, 1851
All orders left at ANDREW DUFFY'S Stove Mandatory
It'll street, will be promptly attended to; at GEORGE
BELLS, Alexandria, Va of King and St. Asaph SITS
ap lift