The Bottineau courant. (Bottineau, Bottineau County, N.D.) 1895-1929, 1914-11-06


this way the rebonnd, Ia damp~d and
thu spring is prevented FROM bending
materially farther than is necessary to
bring it back to its normal position un-
der the loud.
4 MILE UNDER GROUND.
Rssu't IT Ar Interesting Experiment at
Michigan Mine.
~ reference to the deep mine shafts
at Calumet some experiments ron
dnc!-d by members Ut the ,facult- Of
the Michigan College Of Mines are in.
teresting. says the Engineering Maya
zine. 1t had been noticed that In the
vertical shafts at the Tamarack mine.
II aome ore or rock were SPILLED. near
the surface. men WORKING in the bottom
Of the shaft a mile below were NOT
much bothered and sometimes only %
served "a little dust" 1t Is stated
that . a of broken rock could ~
dumped into the shaft without injury
to a man standing directly underneath.
q mile down. The reason 10 that the
rock would never reach the bottom but
would lodge In the sides of the shaft
on the timbers which protrude = few
inches at intervals: that is. the rock
would not fall straight, since these
shafts are exactly vertical.
in the experiments conducted two
round metal balls were dropped into
the center Of a SHAFT bv burning
threads by which they were suspended.
20 as to give them 10 lateral motion,
1t was tried to catch the balls in q box
Of clay IN the bottom Of the shaft; none
Of them were caught One ball .was
never found afterward. The other was
found in the east wall Of the shaft only
. few hundred feet below the surface
The explanation is that the earth is
revolving from west to east. which
gave the ball an eastward component
IN its fall because a particle on tn
surface of the earth n travelling at a
higher rate Of speed than u nearer
the center. slts0ugh atythef sa n,e. angn:
lar velocity. Thus a ball or rock drop.
ped In the shaft will strike the east
wall u few hundred feet from surface.
possibly then rebOuDding several times
IN it's drop until it lodges on a timber
or on 4 level.
Stove Coal IN Demand.
|" Stove and chestnut sizes of anthra.
cite, coal are in the greatest demand
and make op over 40 per cent Of the
total shipments from the mines. accord
ing 70 the United States geological sur
vey. They are essentially domestic
sizes. and the relatively large proper
hon they make of the shipments server
"a IN index to the conditions govern.
ing the anthracite trade. Egg coaI
6nda its way principally t. the fur
,naces Of residences. and pea coal IL
0eed In the same way to some extent,
tborgb It ia also nsed for kitchen
ranges and some Of II goes with the
hnckwheat and smaller sizes tor use
Ms steam cOaI The same sizes come
directly into competition with rhitnmi
nous coal and are sometimes used mix
~ with hifuminOns coal for generating
steam. chiefly in hotels. apartment
houses .lnh flee buildings
New Burglar Protection
F. safe blowers will have y New pr"tes..
rive device to combat n the near
fntrr+ in the form of a chemical 'Tm
pound. designed to produce blindness
A glass containpr holding me pound OF
the gas p%rtH1nring chemicals ia sus
,eDded net ween the outer and the inner
dours or wallis Of the safe. When the
casing ut the safe,,is blown Or drilled
the glass receptacle Is broken. and
when the door is opened the powerful
fumes nj nee render the burglar sight.
less. and " be fails to fnd his way ont
Of tbp room hp becomes n~ncOnsciOus
for severa, hUurs. The flask ia hello
bit n number Of felt surfaces to
prevent accidental breakage when The
safe " being rInwed.
Imports Of aslt.
Common salt continues to BE- import
"a IN considers BILE quantity. more than
,,O0OyOOO barrels coming m Atlantic
ports laxt year. according to the United
Gtst+.a theological rnrvey The tonntry
y amply able. howevpr. to SIMPLY fhe
entine home demand. a. h~ 'npastty
II u aait niner and works n N. ex'
ceos-0f IN. ,pseeept 'ntput The I'm
.posts ~ Neelr. Hegs only ~ ~ cent
u ~, 1otel .censsNpe1qp. whsssas =
~ - percsntase - N2