Daily American telegraph., 1852-08-26
Protection from lightning.

TJNHE undersigned being the duly appointed Agent o.
SpRATT's ELECTRICIAN ELECTRO MErAILURGST LIGHT
NNaRop MAsuYAcroRr Covngton, Kentucky, begs to offer
these superior Rods Carbonized Annealed
Iron with Zinc Protectors and Electroposvs elements
combined in hemanufacture; thus rendering them equal
to copper conductors They in teneet lengths with
new style of metallic (patente attachments for brick or
frame buildings ALSO glass isoaters OF novel and inge
mounted with solid platinum silver point, (patented0
twelve inches long, surrounded at the base with angu
oinary extent Of dschargng the opposite elements Of the
most fearful thunderstorm, and embrace the entire perec
ton Of science up to the sne sne
Safety has not been compromised by aordng these
ceent rods such low rates. the greatest attention has
given their construction as to be readily
The astonishing power of the negative in discharg
ing of its opposite elements has been clearly demon
strated by the Eectrometer when unmagnesed points
have but slight results though placed under the
conditions In fact they gather and silently discharge
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 or
who substituting inferior limitations All agents duly
noRSan''1 ''H 'n'' '''' CHARLES ". IEYDoN,
Washington City.
do hereby certify that have app lied various powerful
chemical reagents to sprats Patent Points Tor Lightning
Rods that the results of these experiments convince me
that they will resist the action Of atmospheric causes and
thereby preserve the extremity most e
senta to protection against lightning The reagents used
in the above experiments solution Of chloride of
dunn common salt) acetc acid suphuric acid and hydro
chloc acid With the first, there no action on the
METAL with the several acids there sg-a fact
sufficient to show that atmospheric influences would have
no sensible effect.
JOHN LEcoNTE. Prof of Nat Phil stChem.
UNIVERSITY OF Ga, October s, 1850.
The Lightning Conductors Of Mr. spratt offered to me-
well calculated TO perform the Office for which they
intended: Yours truly, Prof R0BT. PETER.
LEXINGTON, KY, February 20, 1850
CHICAGO September 3, 1850.
This may certify that have examined somewhat cri
cay James Spratts Patent Lightning Rods and that
Of opinion that It is constructed scientific principles For
combining durability, cheapness, and efficacy, deem It
equal and think SUPERIOR to other rod ever offered
for my inspection. Prof JAS. " 2. BLANEY.
AUGUSTA, (GA) November IL, 1850.
This will certify that have examined the Lightning
Rods Metallic Points and Isolating Attachments, manu-
conformity to the general laws Of the electric uid and the
metallic compound constituting the Points PROMISING
from the result Of several tests TO which they submit
ted TO resist for years the action Of those causes
most likely TO corrode them. A. MEANS,
Prof Phys &c., Emory College, Ga and Prof Chem. and
Pharm., Medical College, Ga.
The Lightning Conductors put by Mr. Henry NJ Smith,
Of this city, the plan Of Mr. Sprat appear to TO DO
very well devised In point Of mechanical construction,
are the best have SEEN
II is to be hoped that Of these Rods may become
general important auxiliary defence against danger
which must be regarded Of ordinary magnitude to
which all buildings are liable. X. SILIMAN, Jr,
Prof Of Chem. in the University Of Louisville.
LOUISVILLE January y, 1851.
All orders left at ANDREW DUFFYs Stove Mandatory,
It'll street. will be promptly attended to- or at GEORGE
BELLS Alexandria, Va, Of King and st. Asaph s
ap1+h