. Scientific American Volume 90 Number 16 (April 1904) . Three Views of the Steering Propeller. (1) Vertical position for steering; (2) Inclined position; (3) Horizontal position for movins up or down. © 1904 SCIENTIFIC AMERICAN, INC 314 Scientific American. April 16, Portable Apparatus Carried in a Bag. A PORTABLE OXYGEN-INHALING APPARATUS. BY EMILE GUARIHI. The apparatus illustrated herewith is the inventionof Dr. Guillelminetti, and seems to us to be destinedto render very great services. In 1891 Dr. Guillel-minetti, in the capacity of physician, accompanied theexpedition of the astr
. Scientific American Volume 90 Number 16 (April 1904) . Three Views of the Steering Propeller. (1) Vertical position for steering; (2) Inclined position; (3) Horizontal position for movins up or down. © 1904 SCIENTIFIC AMERICAN, INC 314 Scientific American. April 16, Portable Apparatus Carried in a Bag. A PORTABLE OXYGEN-INHALING APPARATUS. BY EMILE GUARIHI. The apparatus illustrated herewith is the inventionof Dr. Guillelminetti, and seems to us to be destinedto render very great services. In 1891 Dr. Guillel-minetti, in the capacity of physician, accompanied theexpedition of the astronomer Janssen for the construc-tion of an observatory at the summit of Mont purposed to study the influence of atmosphericdepression upon himself and a score of guidesand carriers, during a stay of two weeks at analtitude of 14,430 feet. During . the first fewdays, all the members of the expedition wereseriously attacked with mountain sickness, and , of Chamounix, died in a hut among theglaciers, a victim of the altitude. Later on, Dr. Guil-lelminetti observed the same symptoms in a freeballoon on the occasion of half a score of physiologicalascensions made in November, 1901. In the train ofthese observations, he undertook some researches uponthe
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