Daily American telegraph., 1852-05-05
Protection from Lightning.

rNHE undersigned being the duly appointed Agent OF
SPRATTs ELECTRICIAN ELECTRO. LIgHf-
NNGRoD MASurAcToRY Coyngton, Kentucky, bags offer
these superior Rods OF Spratwite Carbonized Annsaled
combined in their msnuSSurs tins rso5srino them eous
TO copper conductors They In tenet lengths with
accurately fitted eonnsctng joints an entire
frame buildings also, glass isoaters, OF novel and inge
nious construction (patented forming lock- the whole
mounted with solid platinum silver point, (patented
twelve inches long surrounded Mt the base with three
lar negative magnets which the TO extra
ordinary extent dschargin the opposite Clements of the
most fearful Thunderstorm and embrace the entire perfec
on of science TO the present ms the whole constu
ting the most aud perfect silent conductor ever
presented to the public.
Safety has not been compromised by adordng these ex
celent rods at such low rates the greatest attention has
been given their construction to be readily utached
The astonishing of the negative magnets In discharg
srated by the Elecrometer when ponts
have shown but slight results, though placed under the
electricity from the atmosphere when you would scarcely
suspect any being present .a.
These improvements being secured by double letters pa
tent you hereby cautioned against laying yourselves
liable by purchasing OF those who not authorized
none CHARLES W. HEYDoN,
Washington City.
hereby certify that have app lied various powerful
chemical reagents to sprat 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
senta to protection against lightning The reagents used
the above experiments solution of chloride
dium, common sat acec acid suphuric acid and hydro
choric acid. With the first, there action the
metal; with the several acids there very slga fact
sufficient to show that atmospheric influences would have
sensible effect
~JoHNLECONTE. Prof Of Nat Phil. OF Chem.
UNIVERSITY OF Ga, October g. 1850. 'f
The Lightning Conductors of Mr. spratt, offered to me-
intended. Yours, truly, Prof ROBT. PETER.
LEXINGTON, KY, February 20, 1850
CHICAGO, September 3, 1850.
This may certify that havo examined somewhat crit
cally James Sprats Patent Lightning Rods, and that
of opinion that constructed scientific principles For
combining durability, eheapness and efficacy, deem
equal and think superior, to any other rod offered
for my inspection. Prof JAS. w. BLANEY.
AUGUSTA, (GA.) November H. 1850.
This will certify that have examined the Lightning
Rods Metallic Points, and Isolatng Attachments
featured by Mr. Sprat and regard them constructed
conformity to the general laws of the electric fluid
metallic compound constituting the Points az promising
from the result of several tests which they submit
ted to resist for the action Of those atmospheric
most likely TO corrode them. A. MEANS,
Prof Phys Sc, Emory College, aa, and Prof Chem and
Pharm., Medical College, Ga
The Lightning Conductors put up by Mr. Henry " Smith,
Of this city, the plan of Mr. Spratt appear be
very well devised and point of mechanical construction
are the best have ever
1t is be hoped these may become
which must he regarded of ordinary magnitude,
which all buildings are liable. r. SILIMAN, Jr,
Prof of Chem. u the University of Louisville.
LOUISVILLE, January y, 1851.
All orders lef at ANDREW DUFFYS Stove Mandatory,
eth street will be promptly attended to; at GEOKGE
BELLS Alexandria, Va Of King and St Asaph sts
ap lift