Daily American telegraph., 1852-09-24
Protection from Lightning.

T,HE undersigned being the duly appointed Agent Of
STRAITS ELECTRICIAN AND ELECTRO slE1AILuReisT Liaar-
ROD MASUFAoToRY Covngton, Kentucky, begs to offer
these superior Rods Of spratwised Carbonized Anneaed
Iron with Zinc Protectors and Elecropositive elements
combined in their manufactures thus rendering them equal
copper conductors They In eneet lengths, with
accurately fitted brassscrew connecting joints entire
frame budings also, glass isoaters, of novel and inge
NOUS construction, atented forming lock; the whole
mounted with solid platinum silver point, (patened
twelve inches long surrounded at the base with three
lar negative magnets which possess the power to an extra
ordinary extent OF schargng the opposite elements of the
most fearful thunderstorm, and embrace the entire perfec
ton of science up to the present me the whole constu
ting the most magnificent and perfect silent conductor ever
presented to the public.
Safety has not been compromised by aordng these
oeent rods at such low rates. the greatest has
been given their to be readily attached
The astonishing power of the negative magnets in discha
the air Of opposite elements has been clearly demon
strsed by the Ecctrometer 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.
These being secured by double letters pa
tent you hereby cautioned against laying yourselves
liable by purchasing those who not authorized or
who substituting inferior limitations All agents duly
appointed can show their Certificates Have good rods or
none. CHARLES w. HEfDON,
Washington City.
do hereby certify that have app lied various powerful
chemical reagents to sprats Patent Points for Lightning
Rods and that the results of these experiments convince
that they will resist the action of atmospheric and
thereby preserve the extremity sharpa condition most
sentia TO protection against lightning The reagents used
dunn common sa acec acid sulphurc acid and hydro
choric acid With the first, there action the
metal; with the several acids, there very sga 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 R0BT. PETER.
LEXINGTON, KT, February 20, 1860.
CHICAGO, September Q, 1850,
This may certify that have examined somewhat crt
cally James Spratts Patent Lightning Rods and that
combining durability, cheapness and efficacy, deem IL
equal and think superior, to any other rod offered
for my inspection. Prof JAS v. r. 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 in
conformity to the general laws of the electric ud and the
metallic compound constituting the Points, promising
from the result of several tests TO which they submit
ted resist years the action Of those atmospheric
most likely 10 corrode them. A. MEANS,
Prof Phys &c. Emory College, Go, and Prof Chem and
Pharm., Medical College, Ga
The Lightning Conductors put up by Mr. Henry NJ Smith,
this CITY, the plan of Mr. Spratt appear TO me to be
very well devised and in point Of mechanical construction
tho best have ever seen.
s be hoped that the Of these Rods may become
general important auxiliary defence against danger
which must be regarded Of no ordinary magnitude to
ghich ali buildings are liable. X. SILIMAN, Jr,
prof Of Chem in the University OF Louisville.
LOUISVILLE January y, 1851.
All orders left at ANDREW DUFFY'S Stove Mandatory
18th strect will be promptly attended to; at GEORGE
BELLS, Alexandria, Va, Of King and st. Asaph sts
14-i