Abstract :
THE past year has been one of very greatly reduced activity in all classes of mines. New machines and new applications of electricity in mining work have been few and, generally, of a minor nature. There has, of course, been no incentive to force production or to increase the capacity of mines, and labor-saving devices have not been in demand because of an unwillingness on the part of operators to aggravate the bad unemployment situation. However, there have been some installations and devices worthy of comment.