Daily American telegraph., 1852-04-17
Protection from Lightning.

TIME undersigned, being the duly appointed Agent OF
SPRArT's ELECTRICIAN cTRo-METALLURGIsT LIGHT
NaRoD MANDATORY Covngton, Kentucky, begs to offer
these superior Rods of Spratwiste Carbonized Anneaed
Iron with Zinc Protectors and Eecropositve elements
combined their manufacturer thus rendering them equal
copper conductors They in teneet lengths with
accurateytted brass connecting joints, entire
new style Of metallic patened attachments for brick
frame buildings ALSO glass solaters, OF novel and lnge
NOUS construction stentd forming lock ane mnSe
twelve inches long, surrounded at the with three
lar negative magnets which possess the power to an extra
ordinary extent dscharng the opposite elements OF the
most fearful Thunderstorm and embrace the entire perfe
Of science up to the present tme the whole constu
ting the most magnificent and perfect silent conductor ever
presented to the public.
Safety has not been compromised by afordng these
ceent rods at such low rates. the greatest attention has
been given their construction as to be readily attached
The astonishing Of the negative magnets In discharg
ing the air OF Its opposite mas clearly Oas
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 by double letters pa
tent you hereby cautioned against laying yourselves
LIABLE by purchasing of those who not authorized
who are substituting inferior limitations All agents duly
appointed show their certificates Have good rods or
none. CHARLEs w. HEiDoN,
Washington City.
do hereby certify that have applied various powerful
chemical reagents sprats Patent Points for Lightning
Rods and that the results these experiments convince
that they will resist the action Of atmospheric causes and
thereby preserve the extremity harpa condition most
senta protection against lightning The reagents used
IN ABOVE experiments VI
dunn common salt acetc acid suphuric acid and hydro
chlorc acid With the rs there no action on the
metal with the several acids there sg-a fact
sufficient to show that atmospheric influences would have
sensible effect.
JOHN LEcoNTE. Prof Of Nat. Phil. ct Chem.
UNIVERSITY OF GA, October s, 1850.
The Lightning Conductors of Mr. spratt offered to mo,
we'll calculated 10 perform the office for which they
intended. Yours, truly, Prof RoBT. PETER.
LEXINGTON, KY. February 20, 1880
CHICAGO September 8, 1885,
This may certify that have examined somewhat crit
caly James Sprats Patent Lightning Rods and that
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. 2. BLANEY.
AUGUSTA, (GA.) November IL, 1850.
This will certify that have examined the Lightning
Rods Metallic Points, and Isolang Attachments, manu-
featured by Mr. Spra and regard them constructed In
conformity the general laws Of the electric uid and the
from the result of several which they submit
ted to rer for the action Of those atmospheric causes
most likely to corrode thom. A. MEANS,
Prof Phys &c., Emory College Ga, and Prof Chem and
Pharm., Medical College, Ga.
The Lightning Conductors put up by Mr. Henry Smith,
Of this CITY, the plan Of Mr. Spra appear TO TO be
very well devised and In point of mechanical construction
are the best have
is 10 be hoped that the Of these Rods may become
general important auxiliary defence against danger
which must be regarded Of ordinary magnitude to
which all buildings are liable. R. SILIMAN, Jr.,
Prof Of Chem in the University OF Louisville.
LOUISVILLE, January II, 1851.
All orders left ANDREW DUFFYs Stove Mandatory,
7h street, will be promptly attended to; or at GEORGE
BELLS Alexandria, Va corner Of King and b. Asaph SITS
ap 14-u