Show CHINESE MINING PROFESSOR SEEKS DATA ON BALLIET DEVICES letson balliet nevada mining engineer recently received a letter from M L chien dean of the fu chung mining college of china and director of the honan mining operations whose position corresponds somewhat to the bureau of mines or state mineralogists and mine inspector of this country prof chein is a graduate of the U of C and a graduate of the michigan school of mines in 1920 he went to tonopah and obtained some practical am american rican ideas while visiting the mines of that locality prof chein in his official capacity in china inquires of mr balliet for specifications designed to provide safety for the mines in the great coal fields of Chia otso the mines of Chia otso are operated through circular shafts that descend vertically to the coal measures square cages are ope operating operatic ratin 9 in these shafts using four wire wire rope guides running through eyes placed at each of the four corners of the cage without safety devices bocatch to catch falling cages it is the fifteenth year of successful operation of the balliet counter balance and the more recently invented y cable catcher that has interested the chinese in the new vada inventions of mr balliet |