who developed an apparatus to breathe compressed air underwater
Scuba set An early diving dress using a compressed air reservoir was designed and built in 1771 by Sieur[10] Fréminet from Paris. He conceived an autonomous breathing machine equipped with a reservoir, dragged behind the diver or mounted on his back.[11][12] Fréminet called his invention machine hydrostatergatique and used it successfully for more than ten years in the harbors of Le Havre and Brest, as stated in the explanatory text of a 1784 painting.[13][14]