* After having sent in this report, the sad news had just been received that Mr. Calwagen has been killed in a flying accident at Kjeller, near Oslo, on the 10th of August, 1925. Immediately after arriving home from Spitzbergen he commenced to work on that branch which he was the first to start in Norway, namely, the reading of the atmospheric conditions by self-registering instruments installed in aeroplanes. In the course of the last year he has personally taken part in many flights in order to complete the registering-dials of the instruments from his own observations. The accident happened during such a flight, just when he was engaged in collecting observations for determining the atmospheric belts. All who were with the expedition will no doubt remember Mr. Calwagen as a practical man, helpful, impulsive, bubbling over with merriment, capable but at the same time possessed of a modesty which was the natural result of his noble altruistic nature. We all feel very grieved at such a man’s death. When it was necessary to have two men for the pilot balloon ascents, Mr. Calwagen got excellent assistance from ice-pilot Ness, who, according to what he himself said, was only too glad to be employed a little on such an occupation during the long hours in which “Fram” lay idle, not giving him enough to do. Altogether sixty-two pilot balloons were sent up between the 15th of April and the 29th of May. It was possible to follow one of them through glasses to a height of 10,500 meters. This, however, was only possible because there was very little wind all the way up. Generally the wind was so strong that the balloon was lost sight of at a much lower height. It will lead us too far into scientific spheres to describe all the methods used in determining the weather conditions from weather-charts and from observations which were made. I shall have to content myself by just mentioning the main principles which must be taken into consideration when choosing the starting day. It is the general experience that the regions which have low air pressure mostly have cloudy weather and rainfall, whilst places with high air pressure have fine weather with a clear sky. The point was therefore to avoid conditions where a depression was moving towards the Pole.