From the June 17, 1933, issue

STRATOSPHERE SHELL PREPARED FOR NAVIGATORS

The little metal sphere that will be the stratosphere home of two men and scientific instruments for a few hours next month is rapidly being completed (SNL, May 27, ’33, p. 323). It is pictured on the front cover with Dr. Jean F. Piccard emerging at the unfinished vertex of the “orange peel” sections of dowmetal, the magnesium alloy one-third lighter than aluminum.