“…It is a quickly acting anaesthetic of low toxicity, and its use in dental anaesthesia has been favourably reported upon by Goldman (1936Goldman ( , 1937, Ramage (1937), Roche (1937), and others irr this country, and by Gunter, Beach, and Looby (1936), Feldman and Cartin (1938), Rosamilia (1938), Lyons and Frank (1939), and Cartin (1938), among others, in America. It is not our purpose here to discuss the physical properties of the drug or the various methods of administration, but to describe briefly the results using one method only, and compare them with those obtained from the use of another anaesthetic of the same type-namely, ethyl chloride.…”