Daily American telegraph. [volume] (Washington [D.C.]) 1851-1852, 1852-10-19
Protection from LIGHTNING.

FTyHE undersgnei being the duly appointed Agent Of
NaRoD MANurAcroRf Coyngton, Kentucky, bsgs to offer
these superior Rods Of Carbonized Anneaed
combined in their manufcture thus rendering them equal
to copper conductors They are In tenet lengths with
new style Of metallic 1patepte attschmsns for brick Or
frame buildings; also, glass isoatsrsf novel and inge
M & asr
twelve inches long, at the base with three angu
lss negative which possess ss the e an extra
most fearful thunderstorm and embrace the entire perfec
ton of science up to the present ms the whole consttu
ting the most magnificent and perfect silent cQpductor
Safety has not compromised by aordng these
ceent rods at such low rates the greatest attention has
been given their construction be readily attached
The astonishing power of the negative magnets in dscharg
strated BY the Eiecrometer when unmagnetised points
have shown but slight results though placed under the
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
who are substituting inferior limitations All agents duly
none. CHARLES w. HEYDON,
Washington City.
do hereby certify that have app lied various powerful
chemical reagents to sprs Patent Points for Lightning
Rods and that the results Of these experiments convince
that they will resist the action Of atmospheric causes and
thereby preserve the extremity condition most
in the above experiments were solution Of chloride
dunn common SALT acetc acid sulphurc acid hydro.
chloric acid. With the FIRST there action the
metal; with the several acids there very soha fact
sufficient to show that atmospheric influences would have
--- JOHN LECONTE, Prof Of Nat Phil. etChem y
UMvERsIrr OF Ga. October 8, 1880. gre E
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, KY, February 90, 1850. q
. CHICAGO, September 8, 1861
This may certify that have examined, somewhat cr~
cally James Sprats Patent Lightning Rods and that
Of opinion that Ii constructed scientific prncples For
combining durability cheapness, and efficacy, deem Il
equal and think SUPERIOR to any other rod offered
for my inspection. Prof JAS. v. e. BLANEY.
4 AUGUSTA, (GA.) November IL, 1850,
This win certify that have examined the Lightning
Rods Metallic Points, and lsoating Attachments
ctured by sprat and regard them constructed In
conformity the general laws Of the electric fluids and the
from result several tests TO which they submit
ted to resist for the action Of those causes
most likely to corrode them. A. MEANS, I
Prof Phys &c., Emory College, Ga, and Prof Chem. and
Pharm., Medical College, Ga ga1lg -
The Lightning Conductors put up by Mr. Henry NJ Smith,
Of this city, the plan Of Mr. 6prat appear TO to bs
very well devised; and In point Of mechanical construction
are the best have 81 s,s. HlllSa.
It to be hoped that the Of these Rods become
general important auxiliary defence against danger
which must be regarded Of no ordinary magnitude to
which eli buildings are liable. r. sIIdMAN, Jr,
Prof Of Chem In the University Of Louisville.
LoUTsvIILR January n, 1851. 5sta .e.
All orders left ANDREW DUFFY's Stove Msnufactory
Tth street. will be promptly attended 10; or at GEORGE
BELLS Alexandria, Va, corner Of King and st. Assph ss
an 14--tf faats fs#-4 lE.e ill W"f Hl s#HHh &c.