Daily American telegraph., 1852-09-27
Protection from Lightning.

rNHE undersigned being the duly appointed Agent cf
NNaRoD MANDATORY Covngton, Kentucky, begs to offer
these superior Rods of Anneaed
Iron with Zinc Protectors and Electroposive elements
combined in their manufacture thus rendering them equal
copper conductors They in tepeet lengths with
accuratey-tted brass connecting joints, entire
new style metallic (patented attachments for brick
frame buildings also, glass isoaters OF novel and inge-
mounted with solid platinum silver point, (patented)
twelve inches long, surrounded at the base with three angu
ordinary extent of dschargng opposite elements of the
most fearful Thunderstorm and embrace the entire perc
ton Of science up to the present time the whole eonsu.
presented to the public.
Safety has not been by aordng these ex.
ceeH rods such low rates the greatest attention has
been given their to be readily attached
The astonishing power Of the negative magnets In discharg
ing the air Its opposite elements has been clearly demon
by the Eecrometer when unmagnetiSed points
have shown but slight results though placed under the
conditions In fact they gather and silently discharge
electricity from the atmosphere when you would scarcely
suspect any being present.
tent you hereby cautioned against laying yourselves
liable, by purchasing OF those who not authorized
appointed can show their certificates Have good rods or
none CHARLES w. HEYDON,
Washington City.
do hereby certify that have app lied various powerful
chemical reagents Spra Patent Points for Lightning
Rods results Of these experiments convince
that they will resist the action Of atmospheric and
senta to protection against lightning The reagents used
in the above experiments solution Of chloride Of
dum common sat) acec acid sulphurc acid and hydro
chlorc acid With the first, there action the
metal with the several acids, there very ga fact
sufficient to show that atmospheric influences would have
sensible effect
JOHN LECoNTE Prof of Nat. Phil ct Chem.
UNIVERSITY OF Ga, October g. 1850.
The Lightning Conductors Of Mr. sprat offered TO me,
well calculated TO perform the Office for which they
intended. Yours, truly, Prof R0BT. PETER
LEXINGTON, Krr February 20, 1850.
CHICAGO, September ., 1850.
This may certify that have examined somewhat crt
cay James sprats Patent Lightning Rods, and that
opinion that II Is constructed scientific principles For
combining durability, cheapness and efficacy, deem Il
equal and think SUPERIOR TO any other rod offered
Tor my inspection. Prof JAS v. 2. BLANEY.
AUGUSTA, (GA.) November IL, 1850.
This will certify that have examined the Lightning
Rods Metallic Points and Isolatng Attachments
featured by Mr. spra and regard them constructed in
conformity the general laws Of the electric fluids and the
metallic compound constituting the Points promising
from the result Of several tesso which they submit
ted resist for years the action Of those atmospheric
most likely to corrode them. A. MEANS,
Prof Phys &C., Emory College Ga, and Prof Chem. and
Pharm, Medical College, Ga.
The Lightning Conductors put by Mr. Henry NJ Smith,
Of this city, the plan Of Mr. spratt appear TO me TO be
very well devised and point OF mechanical construction
the best have ever seen.
1t ia TO be hoped Of these Rods may become
general as an important auxiliary defence against danger
which must be regarded Of no ordinary magnitude to
which ali buildings liable. X. SILIMAN, Jr,
Prof Of Chem. In the University Of Louisville.
LOUISVILLE, January n, 1851
All orders left at ANDREW DUFFY'S Stove Manufactory
7th street. will be promptly attended to; at GEORGE
BELLS Alexandria, va corner Of King and St Asaph sts
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