Port Tobacco times, and Charles County advertiser. (Port Tobacco, Md.) 1845-1898, 1858-06-03

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From, Hon. HoRAcE MANN, L. l.. D., President
Of .antioch College.
would respectfully recommend to the public
the use of 'Ohs's Patent lightning Conductors, -
for the following reasons:
LIST. The rod is large and SQUARE, and a
square rod, by presenting more surface, becomes
better conductor Of electricity than an equal
weight Of the same metal IN round form.
2nd. 1t is continuous rod. Every point OF
junction between the links of chain rod presents
break, and every break is an obstruction to the
free passage Of electricity. The lightning has to
get off from one link on to the next at the ex-
pense of some delay and circuitousness; and.
whenever such delay and circuitousness occur,
the question is always presented to It, whether il
will go to the next link, or go somewhere else
1t is better that this question should never be
raised. The longer the links the less danger OF
divergence, it is true; but where there is any link
there is some danger.
3rd. Otis's method introduces glass nsulator
between the rod and the house or other body to
he protected. The old method of fastening the
rod to the house or other body to be protected
by an iron staple is direct invitation, OF rather
direct command to the lightning to come in; and
when 1t does come in we all know what liberties
it takes Instead Of thus welcoming and order.
ing the lightning to enter, and setting conductor
there to show it the way in, Otis s rod has lateral
points projecting outwards, and these points make
it more natural and easy for the lightning to 60
from the house than towards it. If the rod be
overeharged, these points take part Of the bur-
den and direct it away from, not into the house
Electricity, indeed, is valuable, is Indispensable
In all our dwellings, bat not in the form of bolts
4th Otis's rod is iron, and iron is far less fu
sible than copper. Copper Imelts at 1895 deg
Farenheit, wrought iron at 2796, and cast iron al
3479 deg.
For the above reasons, IL my recommendation
be of any avail, should feel as though were
doing something to save the life and property Of
nv fellow men. Horace MANN.
.qntioch College, Yellow Springs, O., June 9Th
1856.
The Otis Lightning Rod combines more of those
qualities that go to make up perfect Lightning
Conductor, than any ever saw in Europe or A.
merica.-PRoF. HENRY.-Smithsonia Institute.
1t is perfect | could not tell you. to the size
of pins head, how to improve it.-pR. ROBERT
HARE, Philadelphia.
It is the most complete Conductor ever saw.
Hon. B. B. FRENCH, Washington. D. C.
Most of the lightning rods in use are worthless
yea, dangerous; but am happy to say to the
audience that ] can recommend rod called
"Otis's Patent,'' as the best ever saw. and per-
fectIy safe.-DR. BoYNToN, in lecture in Spring
field, Mass.
The undersigned, Agent in Baltimore for the
above rod. will be, with experienced workmen
in the neighborhood of Port Tobacco about the
1st of June where he has been engaged to put uE
the ssOtis Rod Those disposed to avail them
selves of the opportunity Of having perfect light
ming rod carefully put up can do so by calling
upon me, or leaving orders with GEORGE BRENT
ESQ.,, or the Editor Of the Port Tobacco Times.
W. MERRELL, Agent,
Office "American Buildings"
100 West Baltimore street, Baltimore
lie Set.