Marshall County Republican. (Plymouth, Ind.) 1856-1878, 1862-08-07


ats spiral aangcs stiffen the rod and the rough
edges dsspate the electricity. and therein is much
better than smooth surface.'-Ds. BoYsroN.
"The open hanges running spirally 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 vement."-PKoF.
BrckMss.
"When electricity is communicated to a con
Quoting body, il docs not distribute itself uniform
Iy through the whole mass, but exclusively upon
the surface. "-DRArrR's CHEMISTRY. page los.
Cooper is little affected by exposure, whereas,
iron soon rusts. and in few years ceases To be
conductor. ''-BESsox's ESSAYS
A correspondent of the South Bend (fnd) Re
gistcr, OF recent date. says the frame DIV cling of
Nathaniel Frame, in Warren Township, ST. Jo-
seph Co., was struck by lightning. The rods on it
we're square iron. in pieces, connected by burs or
nuts; the electricity eft the rod at the first
necion and passed into the house, doing consider
able damage. During the same month, the dwell
ing ofD. !. Boomer. of Peru Tp, same Co.
struck by lightning. It's rods were Of firted iron,
commercially burrs or nuts. The lightning left the
rod at the first burr, and passed into the house, in
jurcd Mr.. Boomer and wife slightly. and damaged
the house to an extent Of 500. 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 iniur-
ed or destroyed by lightning. The School Board
Of keokuk, 1owa, recently decided to take down
the iron rods their central school house because
OF their ineficicLcy-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 pedlers are busy in certain quarters
circulating the most outrageous stories about the
copper rod We caution the public against them.
"When the building is projected by Munson's
Copper Lightning Rod. FIVE per cent. may be de-
Quoted from the premium note. No deduction for
Iron Rods."-FRon RULES OF INDIANA FIRE Is
sURAycE Co.
"Meta should display as much surface in lateral
dimensions possible. consistent with strength to
reduce intensity Of action on the surface, and heat
ing effect."--APPLEfoS' DIcrIoSARs OF MEcHAs-
les, page il6-
"Iron, on account Of its low conducting power.
is more easily melted than copper "--CycLorEpIA
or UskFuL ARTs, page 557.
at is we'll known the greater the surface Of the
conductor in proportion 10 its mass the heavier dis
charge will il be able TO conduct safely. For in
stance: rcd which is 81 times as wide as it is
thick, will conduct charge about IS per cent.
greater. without being melted, than rod which is
square and has the same cross sections. "-MosEs
&. FARNEp. ELECTRICAL EsoixEEa
"The efficiency Of Lightning Conductors does
not depend so much upon their power TO attract the
lightning. as upon the power of a point to draw a
way. inscnsbiy, very powerful charges of electric
ity from the electrified cloud, thus preventing the
disruptive discharge."-PsoF. SILLlMAx
IL would not hesitate 70 commend Munson's
Rod to all who wish perfect protection from &C
cidents BY lightning.--PRoF. BRowS OF THE N.
W. c. UNIVERSITY.
I.F