The Chairman referred with sorrow to the loss of Dr St John, the former President of the Commission, who died a few months before the meeting.

Solar radiation. The President suggested and Prof. Chapman agreed that it would be interesting to make investigations at high altitudes, especially at wave-lengths of about 2100 A.

Solar Spectroscopy. Prof. Russell said that the publication of new tables of the infra red solar spectrum would be delayed by the illnesses of Miss Moore and of Dr Babcock.