Daily American telegraph. [volume] (Washington [D.C.]) 1851-1852, 1852-09-07
Protection from Lightning.

I,HE undersigned being the duly appointed Agent Of
sPRATTs ELEcTRcAN AND NEUTRALITY-SUSPICIOUS. La as
RoD MANDATORY Covngton, Kentucky begs to onef
these superior Rods of spratwisted Carbonzed
Iron with Zinc Protectors, and Retrospective clement
combined in their manufacture; thus rendering them equal
copper conductors They in ten-feet lengths Win
accurateytted brassscrew connecting joints an entire
frame budngs Also glass isoaters of novel and nge-
NOUS construction, pstented forming iock the whole
mounted with solid platinum silver point lpatented1
twelve inches long, surrounded the base with three angu
lar negative magnets which possess the power to an OK
ordinary extent of chargng the opposite elements OF the
most fearful Thunderstorm and embrace the entire perS
ton of science up to the present me the whole consttu7
ting the most magnificent and perfect silent conductor ever
Safety has not been compromised by aording these
celent rods at such low rates. the greatest attention has
been given their construction to be readily attached
The astonishing Of the negative magnets IN dischar
the air of its opposite elements has been clearly demon
strated by the Eectrometer when unmagnetzed points
have shown but slight results, though placed under the
conditions fact they gather and silently discharge
electricity from the atmosphere when you would scarcely
These improvements being by double letters pa
tent you hereby cautioned against laying yourselves
liable by purchasing of those who are authorized
who substituting inferior limitations. All agents duly
appointed can show their certificates Have good rods or
none. CHARLES w HEfDoN,
Washington City,
do hereby certify that have app lied various powerful
chemical reagents to spras Patent Points for Lightning
Rods and that the results Of these experiments convince me
that they will resist the action of atmospheric causes and
thereby preserve the extremity sharpa condition most es
senta protection against lightning The reagents used
dunn common sa acetc acid sulphurc acid and hydros
chlorc acid With the FIRST there was no action ON tbs
metal; with the several acids there was very ga fact
sufficient to show that atmospheric influences would have
sensible effect tt
JOHN LEooNTE, Prof OF Nat. Phil ct Chem.
UNIVERSITY OF Ga, October 8, 1885,
The Lightning Conductors Of Mr.. Sprat offered to me;
well calculated to perform the office for which they arc
intended. Yours, truly, Prof ROBT. PETER
LEXINGTON, KY. February 20, 1850.
CHICAGO, September g. 1850.
This may certify that have examined somewhat ert
cay, James Sprats Patent Lightning Rods and that am
Of opinion that It constructed on scientific principles For
combining durability, cheapness and efficacy, deem II
equal and think SUPERIOR TO any other rod ever offered
for my inspection. Prof JAS v. r. BLANEY.
AUGUSTA, (GA.) November IL, 1850.
This will certify that have examined the Lightning
Rods Metallic Points and Isolatng Attachments, manu-
featured by Mr. Spra and regard them as constructed In
conformity the general laws Of the electric fluids and the
metallic compound constituting the Points, promising
from the result several tests TO which they submit
ted TO resist for years the action OF those atmospheric causes
most likely 10 corrode them. A. MEANS,
Prof Phys &C., Emory College, Ga, and Prof Chem and
Pharm, Medical College, Ga.
The Lightning Conductors put up by Mr. Henry M Smith,
this city, the plan of Mr. Spratt appear 70 me TO be
very well deyised and point Of mechanical construction
the best have
1t to be hoped that the Of these Rods may become
general MS an important auxiliary defence against danger
shch must be regarded OF ordinary magnitude to
which ali buildings are liable. X. sILIMAN, Jr,
Prof Of Chem. in the University Of Louisville.
LOUISVILLE, January n, 1851.
All orders left at ANDREW DUFFY'S Stove Mandatory,
18th street, will be promptly attended to; or ut GEORGE
BELLS Alexandria, Va corner OF King and st. Asaph sts
ap 14-f