"The word oxyd, then, simply means a metal combined with oxygen?"
"Our first impression was, that it possessed all the anæsthetic properties of the nitrous oxyd, was equally safe, and could be prepared with less trouble, thus affording an article which was not expensive, and could always be kept at hand."
"The principle is as fully developed by the painless extraction of teeth, as by the painless amputation of a limb; by the successful use of nitrous oxyd gas, as of rectified sulphuric ether."