Marshall County Republican. (Plymouth, Ind.) 1856-1878, 1862-07-10


ats spiral fanges stifTen the rod and the roHgh
edges dissipate the electricity, and therein is much
better than a smooth surface."-DR. Borsros.
"'fhe open 0anges running sprally the whole
length of the rod, enable the fluid to freely ira
verse both surfaces and at the same time pursue
the spiral course natural to its movement."-pRoY.
BucKNAN.
"When electricity is communicated to a
Quoting body, il does not distribute itself uniform.
ly through the whole mass, but exclusively upon
the surface "-DRArER's CHEMISTRY, page los.
cooper is little affected BY exposure, whereas.
iron rusts. and in few years ceases to be
conductor. "-BEvsos's ESSAYS.
correspondent of the South Bend (Ind.) Re-
gstcr. of recent date says the frame dwelling of
Nathaniel Frame, in Warren Township. St. Jo--
seph Co., was struck by lightning. The rods on it
were square iron. in pieces, connected by burs or
nuts the electricity left the rod at the first con-
nection, and passed into the house, doing consider
able damage. During the same month, the DWELL
ing of ID. |. Bloomer, Of Peru Tp.. same Co., was.
struck by lightning. Its rods were of futed iron.
connected by burrs nuts. The lightning left the
rod at the first burr, and passed into the house, in
jured Mr. Bloomer and wife slightly, and damagedi
the house to an extent of 800. Mr. Writer'S
house, in German Tp., St. Joseph Co.. was similar
ly protected, ~ and being struck, the Lightning
left the rod at the third nut and seriously damaged
the house. We have numerous instances where
buildings covered wi iron rods, have been injur-
ed or destroyed by lightning. The School Board
of keokuk, Iowa. recently decided to take down
the iron rods their central school house, because
Of their inefiicieLcy-the building having been
struck by lightning and materially damaged--and
ordered the erection of Munson's Spiral Copper
Rod. We learn that notwithstanding these facts,
the Iron rod pedlcrs busy in certain quarters
circulating the most outrageous stories about the
copper rod. We caution the public against them.
s.When the building is protected by Munson's
Il ifrbfr od GVa nor -
Quoted from the premium note No deduction for
Iron Rods"-FnoN RULEs OF INDIANA FIRE In
sURANcE Co.
"Metal should display as much surface in lateral
dimensions as possible. consistent with strength 70
reduce intensity of action on the surface. and heat
ing effecs-"-ArrLEroS's DIc1IoSARs or MEcHAS-
les, page 4l6 ef
"Iron, On account Of its low conducting power.
is more easily melted than coppcr."--CycEorEDIa
or UsxruL ARrs, page 557.
"It is we'll known the greater the surface of the
conductor in proportion TO its mass, the heavier dis
charge win il be able to conduct safely. For in
stance: rod which is 81 times as wide as IL is
thick, will conduct charge about - per cent.
greater. without being melted. than rod which 10
square and has the same cross ections-"-MosEs
g. FARxER, ELEcTRIcxL ENcINEER.
"The efficiency Of Lightning Conductors does
not depend SO much upon their power to attract the
lightning as upon the power o. point 70 9nw
ity from the electrified cloud, thus preventing the
disruptive discharge. SILLinAs.
81 would not hesitate 10 commend Munsons
Rcd to ali who wish perfect protection from ac-
cidents by lightning. Baows OF THE N.
w. G. UNIVERSITY. t9p
Orders NAV be sent bv mail, or left at our Office,
No. 1. Blackford's Block, Immediately over Amer
lean Exnress Co. Office. Price twenty-five cents
per foot and two pcIars for points There Is .;