MR. D. N. WADIA, author of the well-known “Geology of India for Students”, retired from the Geological Survey of India in 1938, and shortly after took up the appointment of mineralogist to the Government of Ceylon. He was president of the Geological Section of the Indian Science Congress at its jubilee session in Calcutta in 1938, and became general president of the whole Congress at the twenty-ninth session held this last January at Baroda ; he is the third geologist to fill this position. During his Indian service Mr. Wadia was engaged mainly in the study and mapping of the post-Archæan folded formations of north-western India, including Kashmir. In his present service, in Ceylon, he has been called upon to study the rocks at the other end of the geological scale, forming the Archaean basement. This exceptional diversity of opportunity has enabled him in his presidential address to the Indian Science Congress (Proc. 39th Ind. Sci. Cong., Part II, 3-23 ; 1942) to discuss with wide experience the “Making of India”, in which he makes particular use of data derived from Ceylon, which, of course, is only a detached fragment of the Peninsula of India.