Hawley, in reviewing the use of ethyl chlorid as a general anesthetic in minor operations, states that after several years of more or less constant use of ethyl chlorid, both in clinical and private practice, he has still to see the first case in which it has caused him the slightest uneasiness. The following precautions in its administration should be observed: (1) The patient should be prepared as for chloroform or ether; (2) whatever mask is used, it should fit the face snugly; (3) a graduated tube with a large aperture should be used; (4) the anesthetic should be well supplied with air and as little given as possible; (5) care should be taken not to present it at first in too large a quantity; frequently a dram is quite sufficient for short operations; (6) the patient should rest a while after its administration, as faintness sometimes supervenes; (7) a mask should be used which does not receive the drug close to the patient’s face, otherwise one is liable to either freeze the face of the patient or to cause asphyxia by the moisture from the expired air freezing on the gauze in the mask, and thus preventing the free passage of air to the patient. The use of ethyl chlorid has the following advantages: (1) Safety in administering; (2) ease of administration; (3) it rapidly produces surgical anesthesia; (4) it can be used where chloroform or ether would be contra-indicated; (5) the patient can be kept in any position during anesthesia, upright or prone; (6) no cyanosis need occur during administration; (7) the patient recovers promptly without after-effects; (8) it is inexpensive; (9) it can be used for a long or short operation with equal success; (10) it is especially useful as a preliminary to other anesthetics, decreasing the time required for the production of anesthesia and avoiding shock and discomfort to the patient. LOCAL ANESTHESIA ETHYL CHLORID Ethyl chlorid is a colorless, mobile liquid, which boils at 52° F. This is furnished in thirty- and sixty-gram glass tubes, sealed with a metal screw cap or spraying device. As this cap is removed the liquid in the tube begins to boil, owing to the temperature of the room, or, better, the operator’s hand, and a fine vapor spray is ejected from the opening.