Robert H. Goddard and also a liquid oxygen-gasoline rocket With the late 19th century researchers realized that air could be liquefied and its elements isolated by compressing and cooling it. Using a cascade approach, Swiss chemist and physicist Raoul Pierre Pictet evaporated liquid sulfur dioxide in order to liquefy carbon https://tituspzhpv.imblogs.net/85633244/oxygen-chambers-for-dogs-no-further-a-mystery