Bisbee daily review., 1913-12-21
PECULIAR PHENOMENON
Falling Ore Would Never Reach Bot
 tom of Deep Copper Mines

 If whole tram load oi ore were
 6r1ped into the mouth of one of the deep vertical shafts of the Copper
 Country. probably not one piece of it
 would ever reach bottom, and a per son could therefore stand in the bot tom of one Of these shafts with en- tire safety while ore was poured in at the top. says inc Ispeming. Mich. Record. The marvel of this is not one of the mysteries of caverns or deep holes in the ground. but instead only one of those simple phenomena that prove that although most of us
 have heard that the earth is round
 like ball and rotates on it's axis from west to east, few of us actually realize it.
 Within radius of a mile, at Calu- met, Mich, are the three deepest shafts in the world, one of them be- ing 28 feet over a mile deep. No where else in the world is there so splendid a chance to try experiments with falling bodies. Accordingly the
  College of Mines has availed itself of the opportunity to work out a few of the freaks of nature" One of tho eX- periments consisted in dropping a smooth metal bali two inches in d. ameter from the center of the shaft and trying to catch it in a box of clay set in the shaft 4,20O feet down. An other ball was let loose from the southwest corner of the shaft The balls were dropped by burning tho thread by which they were suspended, so that in starting to fall they would have no sidewise motion. The shaft 1 is 9 by 30 feet in cross section. and the first of the balls was suspended four feet from the opposite corner. ! Neither Of them ever reached the boz; | of clay, one of them was never found. and the other one, presumably the one started from the center. was later found by a workman lodged in the Htimbers on the east side of the shaft 500 feet from the surface. Whatever bodies were dropped into the shaft in- lyariably lodged somewhere in the cast wall.
 This happens simply because the earth i5 rotating on its axis from west
 to east. At Calumet a particle on tho surface is moving to the east at the
 rate of about a thousand feet a sec oad; but a particle 5000 feet down | the shaft. just keeping even with the | particle on the surface. is moving eastward at a rate which is four inches less than the thousand feet q second velocity; it was not only nov inr eastward at that rate when 1t istarted to fall. but continued moving tcastWard at that rate all the way down the shaft Meanwhile 1t drop lred to the bottom of the shaft at a irate which EGuld nave mace it mako tI7lk seconds for the fall if there had been no resistance of the air to en. ] counter. During this I71h seconds, tbe particle at the surface, and the ! ball falling at the same rate, travelled i7i5times f inches or nearly 6 feet farther eastward than the particle at ! the bottom. As a matter of fact the resistance or thc a1-, at the nigh speed
 the ball acquired soon after starting,
 was sufficient to prevent any further 1 aecellerstion. and consequently the i bali was much longer than 17lk | seconds in falling. Ia fact. only 500
 sect of fall was required for the bali
 tO make the four feet from the center
 of the shaft to the east wall. and the
 other ball must have lodged at some IIoipi not much farther doWr.
 Nov f tie walls of the shaft were tsmooth and free from obstrucgions, no
 doubt a falling body would rebound
 from side to side of the shaft and
 finally reach the bottom; but tie many
 timbers in the Innings of the shaft.
 and the levels all the way down. fur inish places where body is sure to