PROFESSOR TAKEMATU OKADA

in a number of selected local observatories. The activity of the seismologists under his guidance may be judged from the number of the important papers already published.

To provide for the rapid development of aeronautical practices he founded a special department of aeronautical meteorology in the Central Meteorological Observatory and, connected with it, a number of branch observatories in the vicinities of the chief aerodromes and also along the main regular routes of aerial communication.