Daily American telegraph. [volume] (Washington [D.C.]) 1851-1852, 1852-06-02
Protection from lightning.

VNHE undersigned being the duly appointed Agent Of
NNGRoD MANUFAcroRr Covngton, Kentucky, begs to offer
these superior Rods of Carbonized Anneaed
Iron with Zinc Protectors and Eecroposye elements
combined in their manufacturer thus rendering them equal
TO copper conductors They in eneet lengths with
brass connecting Joints an entire
style (patented attachments for brick or
frame buildings also, glass isoaters, OF novel and inge
mounted with sOd platinum silver point teateSted
twelve inches long at the with angu
lar negative which possess the power to an extra
ordinary extent dschargn the opposite elements of the
most fearful thunderstorm, and embrace the entire perfe
ton OF science to the present times the whole oonsu
ting the most magnificent and perfect silent conductor
presented to the public.
Safety has not been compromised by aordng these ex
celent rods ut such low rates the greatest attention has
been given TO their TO be readily attached
The astonishing power of the negative magnets dscharg
ing the air of its opposite elements has been clearly demon
strated by the Electrometer when unmagnezed 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
These improvements being secured by double letters pa
tent you hereby cautioned against laying yourselves
LIABLE by purchasing of those who not authorized
appointed show their certificates Have good rods
none. CHAhLES W. HEfDON,
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 and
thereby the extremity sharpa condition most
senta to protection against lightning The reagents used
In the above experiments solution of chloride
dunn common salt) acetic acid suphuric acid hydro
chlorc acid. With the first there action the
metal with the several acids there very sga fact
sufficient show that atmospheric influences would have
no sensible effect.
JOHN LECONTE, Prof of Nat Phil ct Chem.
UNIVERSITY OF Ga, October s, 1850
The Lightning Conductors of Mr.. spratt offered me,
well calculated to perform the office for which they are
intended. Yours, truly, Prof R0BT. PETER
LEXINGTON, KY, February 20, 1850.
CHICAGO, September g. 1850
This may certify that have examined, somewhat crit
caly James Sprats Patent Lightning Rods and that am
opinion that is constructed scientific principles For
combining durability, cheapness and efficacy, deem 1t
equal and think SUPERIOR to other rod ever offered
for my inspection Prof JAS v. q, BLANEY
AUGUSTA, (GA) November il 1850.
This will certify that have examined the Lightning
Rods Metallic Points, and Isolating Attachments, manu-
featured by Mr. Sprat and regard them constructed In
conformity the general laws of the electric ui and the
metallic compound constituting the Points as promising,
from the result which they submit
ted to resist for years the action OF those causes
1 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 up by Mr. Henry NJ Smith,
of this city, the plan of Mr. Sprat appear to to be
very well devised and in point of mechanical construction
| the best have
1t be hoped that the of these Rods become
general important auxiliary defence against danger
which be regarded of ordinary magnitude to
| which all buildings are liable. II. SILIMAN Jr.,
Prof of Chem. in the University Of Louisville.
| LOUISVILLE, January 81 1851.
All orders left at ANDREW DUFTYS Stove Mlnufactory
BELLS Alexandria, ya of King and ST. Asaph SITS
14-tf