On May 28th we took two soundings immediately after each other, and in both cases the stop-clock’s time proved to be five seconds. As sound travels in sea-water at the rate of 1,500 meters per second, the distance from the surface down to the bottom and up to the surface again is equal to 7,500 meters, and thus the sea’s depth is at this place half the amount, namely, 3,750 meters. The echo was quite sharp and not to be misunderstood. Therefore during a later drift, as we did not move far from the place where we had taken the first sounding, we took no more. We wished to reserve the spare charges for a possible march. _Variations_ For the exact “taking of the sun” the standard compass was equipped with a special finder, in the same way, as there were water-levels on the compasses. The compass was placed in the best position, where it would be as far away as possible from every object likely to influence it. Observations were taken on the 23rd and 29th of May, with the results respectively, 39° 5′ and 30° westerly variation. This is about 5° more variation than the chart allows. These observations proved to be of great use to us when we started the homeward flight. By calculating with these variations in arranging our starting course we found we had achieved an important measure. * * * * * I will now briefly give particulars of our further equipment. Photographic materials and binoculars, etc., were given to us by Goerz, the cinematograph appartus was a gift from the “Hahn Aktiengesellschaft für Optik & Mechanik,” Berlin. The films and plates for the camera, also the cinema films, were given to us in generous numbers by the “Goerz Photochemische Werke,” Berlin. It is quite unnecessary to mention that all the things given to us by these firms were of first class material and everything functioned to our greatest satisfaction, giving excellent results in spite of the difficult conditions. Our snow glasses were a present from the firm, Optikus, Oslo, and were specially made for us. They could not have been better. When I count them as amongst the most important part of our outfit, I have good grounds for doing so. Any one wishing to choose glasses, and looking through the different types, will find that there is a tremendous difference between them both as regards suitability of color and other things.