Daily American telegraph. [volume] (Washington [D.C.]) 1851-1852, 1852-05-25
Protection from Lightning.

lVHE undersigned, being the duly appointed agent "
IL SPRArTs EEcTRIcAN AND ELECTRO MErALLURoisf LIGHT
NoRoD MANUFAoroRY Coyington Kentucky pegs 70 oIei
these superior Rods Of Annsaeo
Iron, with Zine Protectors and EectroposuVe elements
combined in their manufacturer ts rendering them equal
TO copper conductors They are In teneet engts with
accurately connecting joints AN entire
new style of metallic paented attachments, for brick
frame buildings also, glass solaters OF novel and nge
NOUS construction PatentedD forming lock; the whole
mounted with q solid platinum silver point, (patented)
twelve long, surrounded at the base with three
lar negative magnets which possess the power
ordinary extent dschargng the opposite elements Of the
most fearful Thunderstorm and embrace the entire perfc
ton OF science up the present me the whole
ting the most magnificent and perfect silent conductor
presented to the public.
Safety has been compromised by afordng these
eent rods at such low rates. the greatest attention has
been given to their To be readily attached
The astonishing power Of the negative magnets in dschar
ing the air OF Its opposite elements has been clearly demon
strated by the Electrometer when unmagnetzed points
have shown but slight results though placed under the
same 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 are hereby cautioned against aging
LIABLE by purchasing of those who are not author1e or
who are substituting inferior limitations All agents July
none CHARLES W, HEYDoN,
Washington City.
do hereby certify that have app lied various powerful
chemical reagents to sprats Patent Points for lightning
Rods the results of these experiments convince me
that they will resist the action of atmospheric causes and
thereby preserve the extremity sharp condition most es
sena to protection against lightning The reagents used
in the above experiments solution Of chloride Of
linn common ga acec ncid sulphurc acid and hydro
rhloric acid With the first there action on the
metal with the several acids, there very sga fact
sufficient show that atmospheric influences would have
no sensible effect.
JOHN LEcoNTE, Prof of Nat. Phil. ct Chem.
UNIVERSITY OF Ga. October g. 1850.
The Lightning Conductors of Mr. spratt offered to me,
intended Yours, truly, Prof R0BT. PETER.
LEXINGTON, KY, February 20, 1850.
CHICAGO, September 8, 1850.
This may certify that have examined, somewhat criti
cally, Spratts Patent Lightning Rods and that
of opinion that 1t is constructed scientific principles For
combining durability, cheapness, and efficacy, deem 1t
equal and think superior to any other rod offered
for my inspection Prof. JAS. v. e. BLANEY
AUGUSTA, (GA) November IL, 1850.
This will certify that have examined the Lightning
Rods, Metallic Points, and 1soating Attachments, manu-
featured by Mr. Sprat and regard them constructed in
conformity the general laws of the electric fluid and the
from the result Of several to which they submit
ted to resist for years the action Of those atmospheric
most likely to corrode them A. MEANS,
Prof. Phys. &c. Emory College, Ga and Prot. Chem. and
Pharm, Medical College, Ga.
The Lightning Conductors put up by Mr. Henry Smith,
of this city, the plan of Mr. Sprat appear to to be
very well devised and in point of mechanical construction
the best have
1t is to be hoped that the of these Rods 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 DUFFY'S Stove Mandatory
18th street, will be promptly attended to- at GEORGE
BELLS Alexandria, ya of King and ST. Asaph SITS
an l4-tf