Daily American telegraph. [volume] (Washington [D.C.]) 1851-1852, 1852-05-08
Protection from Lightning.

hE Undersigned, being the duly appointed Agent OF
sPRATrS ELEcTRoAN AND ELECTRO MLTALLURdIsr LIGHT
NINGRoD MANUFAcToRY Covngton, Kentucky, bags offer
these superior Rods ofspratwisted Carbonizod Annsaod
lron with Zinc Protectors and Eectroposive elements
combined in their manufacturer thus rendering them equal
to copper conductors They in teneet lengths, with
style of metallic (patented) attachnent for brick
frame buildings also, glass isoaters of novel and inge
NOUS construction, paented forming lock; the whole
mounted with solid platinum silver point (patened
twelve inches long, surrounded at the three angu
lar negative magnets which possess power
ordinary extent dscharging the opposite elements of
most fearful thunderstorm, and embrace the entire perec
ton of up the present tme whole consttu
ting the most magnificent and perfect silent conductor
presented to the public. 1.., .a E.aal E.w@0aE ,
Safety has not been compromised by aordng these ex
ceent rods at such low rates the greatest attention has
been given their construction to be readily attached
The astonishing of the negative in scharg
log the air of its opposite elements has been clearly demon
strated by the Eecrometer when unmagnetized points
have shown but slight results though placed under the
same conditions, In fact they gather and silently discharge
electricity nom tho atmosphere when you would scarcely
suspect any being present " .si tpara
tent you hereby cautioned against laying yourselves
LIABLE by purchasing of those who not authorized
who substituting inferior limitations All agents duly
appointed show their certificates Have good rods
none. CHARLES w. HEYDoN, !.
Washington City.
do hereby certify that have app lied various powerful
chemical reagents TO sprats 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 sharp-a condition most
sental protection against lightning The Reagents used
in the above experiments solution of chloride of
diu, common sal acec acid suphuric acid, and hydro
choric acid. With the first, there action the
metal; with the several acids there very 3a fact
sufficient to show that atmospheric influences would have
no sensible effect.
JOHN LEcoNTE Prof Of Nat Phil ct Chem
UNIVERSITY OF GA. October g. 1850, ~.~r-.'.
The Lightning Conductors Of Mr. spratt offered to me-
are well calculated t.. perform the once for RoRh Rhch hey ars
LEXINGTON, Ky, February 20, 1880.
CHICAGO, September 3, 1850.
This may certify that have examined somewhat criti
cally James sprats Patent lightning Rods, and that
Of opinion that constructed scientific principles For
combining durability, cheapnes ande efficacy, deem it
elua and think superior, to any other rod offered
for my inspection. Prof JAS V. 2. BLANEY.
AUGUSTA, (GA.) November IL, 1860.
This will certify that have examined the Lightning
Rods Metallic Points, and Isolang Attachments,
ctured by Mr. Sprat and regard them constructed in
conformity the general laws of tho electric fluid and
from the result Of several to which they submit
tod to resist for years the action OF those atmospheric
most likely to corrode them. A. MEANS,
Prof Phys &c. Emory College, Ca and Prof Chem and
Pharm., Medical College, Ca
The Lightning Conductors put up by Mr. Henry NJ Smith,
cf this city, the plan of Mr. Spratt appear be
very we'll dsvised and in point Of mechanical construction
are 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. Il. SILIMAN, Jr,
Prof. Of Chem. in the University OF Louisville.
LOUISVILLE, January e, 1851.
III orders left at ANDREW DUFFYs Stove Mandatory,
th street, will be promptly attended to; at GE0hGE
BELLS Alexandria, w. corner Of King and St. Asaph 6ts
np 14-tf