From the July 4, 1936, issue

TINY TRANSPARENT BALLOONS PROBE STRATOSPHERE SECRETS

Shimmering bags of transparent material of the kind used in wrapping cigarette packages are the latest tools of science to tap stratosphere secrets. Soaring to altitudes of 20 miles, these small, unmanned balloons are being used to pierce the atmospheric heights far above where men can probe them with giant balloons carrying loads of equipment and human pilots.