Robert H. Goddard and a liquid oxygen-gasoline rocket Because of the late 19th century researchers recognized that air could be liquefied and its factors isolated by compressing and cooling it. Utilizing a cascade process, Swiss chemist and physicist Raoul Pierre Pictet evaporated liquid sulfur dioxide in order to liquefy carbon https://oxygenchamberstokeontrent95061.blog-gold.com/47067934/details-fiction-and-cost-of-oxygen-chamber