Daily American telegraph. [volume] (Washington [D.C.]) 1851-1852, 1852-05-19
Protection from lightning.

TINE undersigned, being the duly appontea As9ns ~
spRATTs ELECTRICIAN ELECTRO LIGHT.
ESaoD MASUFAcroRr, Coyington, kentacky Degs -
these superior Rods of Spiral CarbonIed Anneae
in their Manufacture rendering them equal
TO copper as conductors They are IN iehgtns Win
accuratelyted brassscrew connecting joints an entire
nav stve of metallic Gatented) attachments, for brick
frame buildings ALSO glass solaters OF novel and inge
Nous construction (paiened) forming lock-; the whole
mounted with solid platinum silver point, (patened
twelve inches long, surrounded at the base with three angu
% magnets which possess the power to an extra
Went of dscharging the opposte elements Of the
most fearful Thunderstorm and embrace the entire perfc
ton up to the present times the whole constu
ting the most and perfect silent conductor ever
presented 10 the public.
Safety has not been compromised by aordng these
ceent rods at such low rates. the greatest attention has
given to their as be readily attached
The astonishing power Of the negative magnets IN
ing inc ar OF It's opposite elements has been
srated by the Electrometer when unmagnetzed poins
have shown but slight results though placed under the
same conditions In fact they gather and silently
electricity from the atmosphere when you would scarcely
suspect any being present , .-L
These being secured by double letters pa
tent you are hereby cautioned against laying yourselves
liable by purchasing of those who not authorized
who substituting inferior limitations All agents duly
aupointed can show their certificates Have good rods
none CHARLES W. hEi DoN,
Washington City.
do hereby certify that have app lied various powerful
chemical reagents to spratts Patent Points for Lightning
Rods the results of these experiments convince
that they will resist the action of atmospheric causes and
thereby preserve the extremity harp condition most es-
sena protection against lightning The reagents used
lium common sat aceo acid suphuric acid, and hydro
chorc acid With the first, there was no action on the
metal with the several acids, there very dg-a fact
sufficient show that atmospheric influences would have
no sensible effect.
JOHN LECoNTE, Prot. of Nat Phil ct Chem
UNIVERSITY OF GA. October 8, 1850.
The Lightning Conductors Of Mr. Spratt, offered to me,
well calculated to perform the office for which they
intended Yours, truly Prot. ROBT. PETER.
LEXINGTON, KY, February 90, 1850
CHICAGO September 3, 1850.
This may certify that have examined somewhat crit
caly James Spratts Patent Lightning Rods, and that am
of opinion that 1t 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 v. 2. BLANEY.
AUGUSTA, (GA.) November II, 1850.
This will certify that have examined the Lightning
Rods, Metallic Points, and Isolang Attachments,
featured by Mr. spra and regard them constructed in
conformity to the general laws of the electric ud and the
metallic compound constituting the Points, promising
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 up by AIR Henry Nj Smith,
Of this city, the plan of Mr. Spra appear to me to be
very we'll devised and in point of mechanical construction
are the best have seen. a.
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 liable. X. SILIMAN, Jr,
Prof Of Chem. in the University of Louisville.
LOUISVILLE January q, 1851.
All orders left ANDREW DUFFYS Stove Mandatory,
It'll street. will be promptly attended to; at GEORGE
BELLS Alexandria, Va of King and St. Asaph SITS.
ap l4-tf