Daily American telegraph. [volume] (Washington [D.C.]) 1851-1852, 1852-07-30
Protection from Lightning.

V'HE undersigned, being the duly appointed Agent Of
SPRATTs ELEoTRIcAN ELECTRO METAILURdiSr LIGHT
NGRoD MANDATORY Coyingon Kentucky, begs TO offer
these superior Rods OF Spiralwsted CarDoned Anneau
Iron, with Zinc Protectors, and Eectropoye elements
combined In their manufacture; thus rendering them equal
10 copper as conductors They in teneet lengths Win
style Of metallic atented) attachments for brick or
frame buidinSs also, glass solaers Of novel and ing
mounted with solid platinum silver point (patented)
twelve inches long surrounded at the base with three an
lar negative magnets which possess the power to an extra
ordinary extent of dsehagng the opposite elements of the
most fearful Thunderstorm and embrace the entire perfec
ton OF science TO the present tme the whole eonstu
ting the most magnificent and perfect silent conductor ever
presented TO the public
Safety has not been compromised by afordng these ez
ceent rods such low rates the greatest attention has
been given 10 their construction Ms TO be readily attached
The astonishing power OF the negative magnets in dscharg
ing the air of s opposite elements has been clearly demon
sraod by the Eectrometcr, when unmagnetized points
shown 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.
These mprov being secured by double letters pa
tent you hereby cautioned against laying yourselves
liable by purchasing of those who not authorized or
who are substituting inferior limitations. All agents duly
appointed can show their certcates have goou roos OF
none. CHARLES W. hbi DON,
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 me
that they will resist the action Of atmospheric causes and
thereby preserve the extremity shap-a condition most c.
sentia protection against lightning The reagents used
cunl common sat) acotc acid suphurc acid and hydro
chlorc acid With the first there was no action ON the
metal with the several acids there was very Sa fact
sufficient show that atmospheric influences would have
no sensible effect.
JOHN LECoNTg, Prof OF Nat. Phil. ct Chem.
| UNIVERSITY or Ga, October s, 1850.
Tho Lightning Conductors of Mr. spratt offered to me-
are well calculated perform the office for which they are
| intended Yours truly, Prof N0BT. PETER.
| LEXINGTON Ky, February 20, 1850
| CHICAGO September 3, 1850.
This may certify that have examined somewhat criti-
cally James Spratts Patent Lightning Rods and that
of opinion that it Is constructed scientific principles For
combining durability chcapness, and efficacy, deem IT
equal and think superior to any other rod ever offered
| for my inspection. Prof. JAS. V. .. BLANEY.
AUGUSTA, (GA) November IL, 1850.
/ This will certify that have examined tho Lightning
Rods Metallic Points and 1soating Attachments, manu-
featured by Mr. Sprat and regard them as constructed in
conformity the general laws of the electric uid and the
metallic compound constituting the Points, as promising,
from the result Of several tests to which they submit
ted to resist for years the action Of those atmospheric
most likely to corrode them. A. MEANS,
Prof Phys &c., Emory College, Ga and Prof Chem and
Pharm., Medical College, Go.
The Lightning Conductors put up by Mr. Henry NJ Smith,
of this city, the plan Of Mr. sprat appear to to be
very well devised and in point of mechanical construction
| arc the best have
1t is to be hoped that the Of these Rods become
general as important auxiliary defence against danger
which be regarded of ordinary magnitude TO
! which all buildings are liable. i. SILIMAN, Jr,
Prof of Chem. in the University Of Louisville.
| LOUISVILLE, January 81 1851.
All orders left at ANDREW DUFFYS Stove Mandatory
7th street, will DO promptly attended to; or at GEORGE
BELLS, Alexandria, Va corner Of King and ST. Asaph SITS
ap 14-u