_Abstract_: A report is to be made on experiments in which the possibility of rescue from high altitudes in the low-pressure chamber is studied. Experiments were made at parachute sinking speeds up to 15 km. [49,200 ft.] without oxygen, and up to 18 km. [59,100 ft.] with oxygen breathing, as well as falling experiments speeds up to 21 km. [68,900 ft.] altitude with and without oxygen. The results with practical significance will be discussed below. Organization: I. Introduction and statement of the problem. II. Procedure of the experiment. III. Results of the experiment. 1. Descending experiments without O_{2} breathing. 2. Descending experiments with O_{2} breathing. 3. Falling experiments without O_{2} breathing. 4. Falling experiments with O_{2} breathing. IV. Discussion of the results. V. Conclusions from the results. VI. Summary. Bibliography. The report includes 28 pages with 3 figures and 6 tables. German Aviation Research Institute For the Institute [signed]: L. RUFF The Authors: [Draft copy signed by] DR. RASCHER Stabsarzt der Lw. [signed] DR. ROMBERG. Berlin, Adlershof, 28 July 1942. Rf 401/20 [page 2 of original] I. Introduction and Statement of the Problem It is theoretically possible for man to reach as high altitude as he may wish in an aircraft with a pressure cabin. However, the question must be settled as to what results or effects the destruction of the pressure cabin will have upon the human being, who in such cases is exposed in a few seconds to the low air pressure and thereby to the lack of oxygen, which is characteristic of high altitude. Of particular practical interest is the question from what altitudes and by what means the safest rescue of the crew can be made. In the work at hand, a report is presented on experiments in which the various possibilities of rescue were studied under special experimental conditions. Since the urgency of the solution of the problem was evident, it was necessary, especially under the given conditions of the experiment, to forego for the time being the thorough clearing up of purely scientific questions. II. Procedure of the Experiment The experiments were carried on in a portable low-pressure chamber with equipment for explosive decompression. The performance of this apparatus limited the highest altitude attainable to about 21,000 meters [68,900 feet].