https://www.historychannel.com.au/this-day-in-history/two-aeronauts-break-world-record-for-altitude-in-a-balloon/ TWO AERONAUTS BREAK WORLD RECORD FOR ALTITUDE IN A BALLOON 5 SEPTEMBER 1862] https://hypertextbook.com/facts/1997/CassandraEng.shtml, Facts Glaisher lost consciousness during the ascent due to the low air pressure and cold temperature of -11.0 °C .