7 APRIL 1923, Page 22

Science Progress.

Science Progress does not seem as interesting as usual this month, although the general considerations on sex- determination and metamorphosis in Mr. Julian Hindey's article on Amphilies are exciting enough in. their conclusions, especially if eventually something of them may be applied in the human case. There is a dreary account by Mr. Spencer Jones of The failure of the British Eclipse Expedition to Christmas Island to settle the question of the Einstein deflec- tion, and a short but well-packed article on the extinct Milobite and its habits of browsing, swimming or crawling.