Daily American telegraph., 1852-08-19
Protection from Lightning.

r,HE undersigned being the duly appointed Agent Of
pan coSpgton Rcntnctx hou, 10 oer
these superior Rods Of Spatwitcd, CarboniLod Annealed
Iron, with Zinc Protectors and Elecropostivs elements
combined In their manufacture; thus rendering them equal
copper conductors Thcy in teneet lengths with
accurately fitted brnssscrew connecting joints entire
new style Of metallic (patentc attachments for brick
frame buildings ALSO glass isoaters, Of novel and inge
nious construction, patentcd0 forming lock- the whole
twelve inches long, surrounded tho with three
lar negative magnets which the to an extra
most fearful thunderstorm embrace the entire perc
ton science up TO the 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
ceent rods ut such low rates. the greatest has
The astonishing Of the negative In dschsrg
ing the air Of its opposite elements has been clearly demon
strated by the Eoctrometer when unmagnetzed points
have but sigh results though placed under the
conditions In fact they gather and silently discharge
electricity the atmosphere when you would scarcely
suspect any being present
These improvements being secured by double letters
tent you hereby cautioned against laying yourselves
liable by purchasing Of those who are not authorized
who arc substituting inferior limitations All agents duly
appointed can show their certificates Have good rods
CHARLES w. uEfDoN,
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 and
thereby preserve the extremity harpa condition most
ssntia protection against lightning The reagents used
dunn common salt) acetc acid suphuric acid hydro
chlorc acid With the first, there action the
metal with the several acids there very sga fact
sufficient to show that atmospheric influences would have
JOHN LEcoNTE, Prof Of Nat Phil. etchem.
UNIVERSITY OF Ga, October s, 1850
The Lightning Conductors Of Mr.. sprat, offered to me-
well calculated to perform the ONCE for which they are
IaIsaros, KIT, February 20, 1850.
CHICAGO, September 8, 1850.
This may certify that have examined, somewhat crit
cally James Spratts Patent Lightning Rods and that
Of opinion that Il Is constructed scientec principles For
combining durability cheapnoss, and efficacy, deem
for nv inspection. Prof JAS v. 2. BLANEY.
H AUGUSTA, (GA) November IL 1850.
This will certify that have examined the Lightning
Rods Metallic Points, and Isolang Attachments, manu-
featured by Mr. Sprat and regard them as constructed
conformity 10 the general laws Of the electric huid and the
from the result Of several tests TO which thoy were submit
ted b resist for the action Of those
most.key TO corrode them. A. MEANS,
Prof Phys Sc, Emory College, Ca and Prof Chem. and
Phsrm, Medical College, Ga.
The Lightning Conductors put up by Mr. Henry Smith
Of this city, the plan Of Mr. Sprat appear to b
well deyised and, In point Of mechanical construction
are the bcst have
It Is TO bc hoped that the Of these Rods may become
which must be regarded of no ordinary magnitude u
which all buildings are liable X. sILIMAN, Jr.,
Prof Of Chem. In the University OF Iousviile
LOUISVILLE, January n, 1851
All orders left at ANDREW DUPFYs Stove Mandatory
7th street, will be promptly attended TO; at GEoRGI
BELDs Alexandria, vn corner Of King and st. Asaph
spA-n