There are fourteen hydrocarbon gases, varying in value from acetylene to octane.
All these gases have anesthetic value, but most of them have other properties that preclude their use in surgery. For instance, with acetylene there is always the possibility of explosion, although clinically its anesthetic value seems to be higher than ethylene and the others in the series. Propylene is easier to handle and administer than ethylene. If the objectionable odor and other impurities could be eliminated, it might possibly prove a valuable anesthetic agent; but as my laboratory experiments with propylene and three other hydrocarbon gases led to no conclusions definite enough to be of practical value, this paper will be confined entirely to ethylene and its different methods of administration.
Experiments with ethylene by different men at various periods bore no practical results or lasting benefits to mankind until the present era. Luckhardt1 deserves the