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Fata Morgana mirage in the desert, vintage engraving
Description of a Fata Morgana optical phenomenon in the desert, it occurs by thermal inversion of warmer air over colder air involving distant objects as mirage
XVIII century engraving, Blanchard balloon flight over Nuremberg
Year 1788, Jean-Pierre Blanchard pioneer in balloon flights at his 28th flight over Nuremberg
Chemistry: lab equipment for nitrogen production
Nitrogen gas is an industrial gas produced by the fractional distillation of liquid air. Nitrogen is formally considered to have been discovered by Scottish physician Daniel Rutherford in 1772, Lavoisier referred to it as “mephitic air” or azote.