tion of twin personalities dating from childhood or youth, but the primary differences and resemblances are due to original nature. The study of twins does not shake our confidence in the importance of education and surroundings, though it impresses upon us at every turn the decisive significance of inheritance and the lawfulness of the mechanics of development. The popular interest in twins is a wholesome one, because twins are a key to many biological and psychological principles at the basis of human welfare.

SCIENTIFIC ITEMS

WE record with regret the death of Henry Marion Howe, emeritus professor of metallurgy in Columbia University; of John Sandford Shearer, professor of physics at Cornell University; of George Simonds Boulger, the English writer on botany; of Ernest Solvay, known for his process for the manufacture of soda; and of C. L. A. Laveran, of the Pasteur Institute.

AMONG five busts unveiled in the Hall of Fame for Great Americans at New York University on May 20 was one of Maria Mitchell, the gift of her nephew, William Mitchell Kendall, and the work of Emma S. Brigham. President Henry Noble McCracken, of Vassar College, where Miss Mitchell was professor of astronomy from 1865 to 1888, unveiled the bust.

DR. RAY LYMAN WILBUR, president of Stanford University, has been elected president of the American Medical Association for the meeting to be held next year at San Francisco.

THE Croonian lecture was delivered before the Royal Society on June 1, by Dr. T. H. Morgan, professor of experimental zoology in Columbia

University. His subject was "The mechanism of heredity."

DR. W. W. CAMPBELL, director of the Lick Observatory, has been elected president of the International Astronomical Union in succession to M. Baillaud, director of the Paris Observatory. The Astronomical Union held its triennial meeting in Rome in May and will hold its next meeting in Cambridge, England.

IT is announced that the contest of the will of Amos F. Eno will be settled out of court by the payment of about four million dollars to Columbia University. The 1915 will, which has been twice broken by juries but both times upheld by courts on appeal, gave the residuary estate to Columbia University. The will made bequests of $250,000 each to the Metropolitan Museum of Art, the American Museum of Natural History, the New York Association for Improving the Condition of the Poor, and the New York University. Had the will been broken finally, these institutions would have received nothing. Whether they receive the full $250,000 each under the settlement, or what proportion of the total they receive, is not disclosed. The Society of Mechanics and Tradesmen received $1,800,000 under the 1915 will, and had that will been broken would have received $2,000,000 under an earlier will. This institution could not therefore be called upon to sacrifice anything in order to satisfy the heirs, and will receive the full $1,800,000.

WE much regret that there was an error in the inscriptions of the illustrations of the note on Hesperopithecus in the last issue of this journal. Fig. 2 on page 589 is the important type tooth, whereas Fig. 1 is the second molar of Hesperopithecus which serves to confirm the first of the type.