Daily American telegraph. [volume] (Washington [D.C.]) 1851-1852, 1852-10-05
Protection from Lightning,

THE undersigned, being the duly appointed Agent Of
NeRoD MANDATORY, Covngton Kentucky, begs to offer
these superior Rods Of Spiral Carbonized Anneaed
Iron with Zinc Protectors and Eectropostive elements
combined in their manufacture thus rendering them equal
to copper conductors They In eneet lengths with
accuraeyftted brass screw connecting joints entire
style of metallic (patsne attachments for brick or
frame buildings also, glass isoaters of novel and nge-
NOUS construction (patentedD forming lock; the whole
twelve inches long, at the base with three angu
lar negative magnets which possess the power
most fearful thunderstorm and embrace the entire perc
ton of science TO the present time; the whols conu-
ting the most magnificent and perfect silent conductor
Safety has not been compromised by aordng these ex
ceent rods at such low rates. the greatest has
been given TO their construction be readily attached
The astonishing power Of the negative magnets In discharg
ing the air of Its opposite elements has been clearly demon
strated by the Eecromster 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
These being secured by double letters DE-.
tent you are hereby cautioned against laying yourselves
LIABLE by purchasing of those who not authorized
who substituting inferior limitations All agents duly
appointed can show their Have good rods OF
none CHARLES w. HEYDON,
Washington City.
do hereby certify that have app lied various powerful
chemical reagents spratts Patent Points for Lightning.
Rods and that the results Of these experiments convince
that they will resist the action Of atmospheric ard
thereby preserve the extremity shsrpa condition
sents protection against lightning The reagents used
experiments solution OF chloride
dunn common sat scec acid sulphurc acid and hydro.
chlorc acid With the first, there action the
inetal witthe several acids, there very sga fact
sufficient to show that atmospheric influences would have
no sensible effect
JOHN LEcoNTE Prof Of Nat Phil etChem.
UNIVERSITY OF Ga, October 8, 1870.
The Lightning Conductors Of Mr. eprat offered 10 me,
are well calculated to perform the once for which they as
LEXINGTON, XII, February 20, 1860.
CHICAGO, September 8, 1851
This may certify that have examin d, somewhat ortiz
cally, James Sprats Patent Lightning Rods and that
Of opinion that 1t Is constructed scientific principles Fer
combining durability, cheapness and efficacy, deem il
equal and think superior 70 any other rod offered
for my inspection. Prof JAS V. T. BLANEY.
AUGUSTA, (GA.) November IL, 1880
This will certify that have examined the lightning
Rods Metallic Points, and Isolating Attachments MANI
featured by Mr. spra and regard them @ constructed in
conformity 10 the general laws Of the electric ud and the
metallic compound constituting the Points, as promising,
from the result of several tests which they submit
ted resist for years the action Of those chuss
most likely 70 corrode them. A. MEANS,
Prof Phys &c., Emory College, Ga, and Prof Chem ana
Phsrm., Medical College Ga
The Lightning Conductors put up BY Mr. Henry NJ smith,
this city, the plan Of Mr. sprat appear 70 me 70 Dc
very vol devised and point mechanical construction,
are the best ] have ever seen.
be hoped that ths OF these Rods may become
general important auxiliary defence against danger
which must be regarded Of no ordinary magnitude, 10
ghiob an buildings are liable. R SlLIMAN, Jr,
Prof OF Chem. In the University OF Louisville
LOUISVILLE, January n, 1901.
All orders lef ANDREW DUFFY's Stove Mandatory,
7th street, win be promptly attended to- or at GEORGE
BELLS Alexandra, Va Of King and St Asaph Sts.
ap l4-u