Daily American telegraph. [volume] (Washington [D.C.]) 1851-1852, 1852-09-29
Protection from Lightning.

7NHE undersigned, being the duly appointed Agent CT
MSeRop MANDATORY Covingon Kentucky, begs to offer
these superior Rods spiralwsted Carbonzed Anneaed
Iron with Zinc Protectors, and Retrospective elements
combined their manufactured thus rendering them equal
copper conductors They in tencet lengths with
accurately fitted brassscraw connecting joints entire
new style metallic atente attachments, for brick
frame buildings Also glass solaers Of novel and inge
mounted with solid platinum silver point patented)
twelve inches long surrounded at the base with three angu
ordinar extent Of schang the opposite elements of the
most fearful thunderstorm, and embrace the entire perfec
ton 81 science up 70 the present time tns whole Gonsat
presented tothe puhlic.
Safety he's not been compromised by aording these
ceen at such low rates; the greatest attention has
been given to as to be readily attached
The astonishing power OF the negative IN dschar
ing the air opposite clements has been clearly demon
strated by the Eectrometer, when unmagnescd points
have 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.
tent You hereby cautioned against laying yourselves
table, by purchasing of those who not authorized or
appointed show their certificates Have good rods
! uone. CHARLES w. HEYDON,
Washington CITY,.
do hereby certify that have app lied various powerful
chemical reagents Sprats Patent Points for Lightning
Rods and that the results experiments convince
that they will resist the action Of atmospheric causes and
thereby preserve the extremity sharpa condition most
sentia to protection against lightning The reagents used
In the above experiments solution OF chloride OF SO.
common sa acetic acid,
chloric acid With the FIRST there no action on the
metals with the several acids, there very sa fact
sufficient show that atmospheric influences would have
no sensible effect
JOHN LECoNTF, Prof Of mat Phil. Chem.
UNIVERSITY OF Ga. October 8, 1850 !.
The Lightning Conductors Of Mr.. spratt, offered to me,
well calculated perform the Office for which they are
| Intended. Yours, truly, Prof R0BT PETER.
LEXINGTON, KY, February 20, 1850.
CHrckao, September 8, $780,
This may certify that have examined, somewhat crit.
cay. James Spratts Patent Lightning Rods and that am
Of opinion that constructed scientific principles For
combining durability, chespness, and efficacy deem II
equal and think superior any other rod offered
for my Inspection. Prof JAS. V. T. BLANEY.
AUGUSTA, (GA.) November IL, 1885,
This will certify that have examined the Lightning
Rods Metallic Points, and Isolatlng Attachments manu-
featured by Mr. Sprat and regard them constructed In
conformity TO the general of the electric ud and the
from the result to which they submit
ted 10 resist years the action Of those atmospheric causes
most likely to corrode them. A. MEANS,
Prof Phys &c., Emory College, Ca and Prof. Chem. ana
Pbarm, Medical College, Ga.
The Lightning Conductors put up by Mr. Henry NJ Smith,
OF this city, the plan Of Mr. Spratt appear TO me TO be
very well devised and point Of mechanical construction
are the best have
II Is to hoped that the Of these Rods may become
general important auxiliary defence against danger
shich must be regarded OF ordinary magnitude, TO
| Tbich ali buildings are liable, X. sILIMAN, Jr,
Prof of Chem. In the University OF Louisville
LOUISVILLE, January q, 1851.
All orders left at ANDREW DUFFYS Stove Mandatory,
9TH street will be promptly attended to; or ut GEORGE
BELLS Alexandria, Va corner Of King and 81 ASaph Sta
l4-u