Daily American telegraph. [volume] (Washington [D.C.]) 1851-1852, 1852-09-01
Protection from Lightning.

VNHE undersigned, being the duly appointed Agent Of
MANUPAcroRY Covington Kentucky begs to offer
these superior Rods of Carbonzed Annealed
Iron with Zinc Protectors, Retrospective elements
combined in their manufactured thus rendering them equal
copper conductors They in tenee lengths with
new style of metallic patente attachments, for brick
frame buildings ALSO glass isoaters OF novel and inge
mounted with solid platinum silver point 0atented,)
twelve long, surrounded at the base with three
~ M oppoe elements Of the
fearful thunderstorm, and embrace the entire perc
ton of science to the present time the whole constitu
ting the most magnificent and perfect silent conductor ever
presented to the public.
ceen at such low the greatest attention has
given their as to be readily attached
The astonishing power of the negative magnets in discharg
ing the air its opposite elements has been clearly demon
stratcd by the Eectrometer when unmagnetzed points
have 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
LIABLE by purchasing Of those who are not authorized or
who substituting inferior limitations All agents duly
appointed show their certificates Have good rods or
| none CHARLES w. HEYDON,
Washington City:
do hereby certify that have app lied various powerful
chemical reagents TO Sprats Patent Points for Lightning
Rods that the results Of these experiments convince
that they will resist the action of atmospheric causes and
thereby preserve the extremity sharpa condition most
sena protection against lightning The reagents used
in the above experiments solution OF chloride OF
chlorc acid With the first, there action the
metal with the several acids, there very sga fact
sufficient to show that atmospheric influences would have
no sensible effect
| n JOHN LECoNTE, Prof Of Nat Phil ct Chem.
UNIVERSITY Ga, October s, 1850
The Lightning Conductors Of Mr. Sprat offered to me,
are well calculated perform the Office for which they
| intended. Yours, truly Prof RoBT PETER
| LEXINGTON, KY. February 20, 1850.
| CHICAGO, September ., 1850
This may certify that have examined, somewhat cri
cay, James Spratts Patent Lightning Rods and that am
Of opinion that is constructed scentc principles For
combining durability, cheapness and efficacy, deem it
equal and think SUPERIOR B any other rod offered
| for my inspection Prof JAS " H. BLANEY
| AUGUSTA, (GA.) November IL, 1880
| This will certify that have examined the Lightning
Rods Metallic Points, and Isolating Attachments manu-.
featured by Mr. Sprs and regard them constructed in
conformity the general laws Of the electric hud and the
metallic compound constituting the Points, promising,
from the result of several tests to which they submit
resist for years the action Of those atmospheric causes
most likely 10 corrode them. A. MEANS,
Prof Phys. Sc. Emory College Ga, and Prof Chem. and
Pharm. Medical College, Ga.
Tho Lightning Conductors put up by Mr. Henry NJ Smith,
Of this city, the plan Of Mr. sprat appear to me TO be
very well Devised and point of mechanical construction
| are the best have
II is TO be hoped that the Of these Rods may become
general rs important auxiliary defence against danger
which be regarded of ordinary magnitude, 70
| which oil buildings are liable H. slLlMAN, Jry
Prof Of Chem. in the University Of Louisville
LOUISVILLE, January y, 1851.
All orders left at ANDREW DUFFYS Stove Mandatory,
eth street. will be promptly attended to; at GE0kGE
BELLS Alexandria, Va Of King and St. Asaph SITS.
| ap 1-d