Daily American telegraph., 1852-07-15
Protection from Lightning.

YINHE undersigned being the duly appointed Agent OF
SPRATgs BLEoTRICAN AND ELEcTRo MEfALLURGIsr MaHt
kaRop MAsurAoToRI Covington, Kentucky begs TO oes
these superior Rods Of Spiral Carbonised Anneaed
Iron with Zinc Protectors and Electro positive elements
combined in their thus rendering them equal
copper conductors They in tenfeet lengths with
style Of metallic atented) attachments for brick or
frame budings also glass solater Of novel and inge
nous construction patented forming lock; the whole
mounted with solid platinum silver point, (patented
twelve inches long, surrounded at the three angu
lar negative magnets which possess the power to an extra
ordinary extent of dschargng the opposite elements Of the
most fearful thunderstorm, and embrace the entire perf
ton Of science up to the present me the whole cons
ting the most magnificent and perfect silent conductor
presented to the public
Safety has not been compromised by aording these
ceent rods such low rates the greatest attention has
been given their to be readily attached
The astonishing power OF the negative magnets in dischar
srated by the Eectromeer when unmagnetized points
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
These being by double letters pa
tent you hereby cautioned against laying yourselves
who are substituting inferior limitations. All agents duly
appointed can show their Have Ia gS9d rSs
none, CHARLES W. HEiDoN,
Washington City. 4
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 causes ana
thereby preserve the extremity condition most
sentia protection against lightning The Reagents used
experiments cnlor1Oe OF So
dium common sat acetc acid suphuric acid and hydro
chlorc acid With the first, there action on the
metal with the several acids there very sga fact
sufficient show that atmospheric influences would have
HNLECoNTE, Prof. Of Nat Phil ct Chem
UNIVERSITY OF GA, October 8, 1850. aw
The Lightning Conductors Of Mr. aprat offered to me-
are well calculated to perform the Office for which they
intended Yours truly, Prof R0BT. PETER.
LEXINGTON, KY., February TO- 1850.
CHICAGO, September 8, 1850.
This may certify that have examined, somewhat criti
caly James Spratfs Patent Lightning Rods and that am
Of opinion that Is scientific principles For
combining durability cheapness, and efficacy, deem 1t
equal and think SUPERIOR any other rod ever offered
for my inspection. gIaat Prof JAS. Y. 2. BLANEY.
lsG VA AUGUSTA, (GA) November H. 1850.
This will certify that have examined the Lightning
Rods Metallic Points, and Isolatng Attachments, manu-
actnred by Mr. Sprat and regard them constructed in
conformity the general laws of the electric ud and the
metallic compound constituting the Points, as promising,
from the result of several tests to which they submit
most likely to corrode them "A. MEANS, .f
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. Sprat appear to to be
very well devised and in point of mechanical construction
are the best have ever seen. .&8
It is 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 27, 1851.
All orders left at ANDREW DUFFYs Stove Mandatory,
7th street, will be promptly attended to-; at GEORGE
BELLS Alexandria, Va corner OF King and st. Asaph sts
14-tf an.8a + s.