Bureau of Standards Begins Technical Courses. A course of instruction in Ein- stein's theory is now being given a t the U. S. Bureau of Standards, Washington, D. C., by Dr. Paul R. Heyl. I t is one of a number of educational courses on various technical subjects pertaining to physics, mathematics, and chemistry, offered for the benefit of young men and women on the Bureau's staff, as well as for outsiders. The courses were hegun twenty years ago under the authority of a joint resolution of Congress opening the government's bureaus for research and educational purposes. Besides Dr. Heyl, the instructors are Dr. T. L. de Bruin, of the University of Amsterdam; Dr. Tobias Danzig, of the University of Maryland; Dr. L. H. Adams of the Geophysical Laboratory, and others. Fees for the courses are charged in order to place them on a self-supporting basis, and to tide over lean years. The courses are under the general direction of an educational committee, of which Dr. L. B. Tuckerman is chairman, and from which information can be obtained.-Science Service