Introductory remarks on present theories of atomic structure

THERE is probably no problem in physics and chemistry at the present time that is of greater interest than that of the structure of the atom. During the past few years especially, a number of the foremost investigators in both physics and chemistry have been speculating upon this problem, and while their views cannot by any means be stated to be in agreement, yet they are of exceeding interest and probably contain in each case an element of the great truth which will probably emerge in the next few years.