30,000 feet in 1901

[siznaudin]

1901, July 31 - German meteorologists Berson and Süring climb to 10,800 m in a free balloon.

 

I do hope they had their thermal underwear on :biggrin:

 

There's some amazing reading here ... http://www.centennialofflight.gov/essay/Lighter_than_air/early_scientific_balloons/LTA7.htm