We have not yet learnt of all the work that has been carried out during the war years, but the impression we have—and we stress that at present it is only an impression—is that the knowledge of the physical condition of snow which causes avalanches is very far advanced; if this is the case further research may perhaps take the form of investigations into the meteorological conditions which bring about the physical changes in the snow.

The Swiss appear also to be turning their attention more and more from the changes of snow in a snowfield to the changes of ice in a glacier—the natural corollary to snow investigations. A similar course was followed by those carrying out snow research in this country.

We hope later to report more fully on progress in snow and ice research abroad.