Хэсгийн мэдээгүйжүүлэлт by Mas To Prezi
1. 1842 On March 30, Dr. Crawford W. Long administered the first anesthetic using ether in Jefferson, Georgia, a small community 60 miles northeast of Atlanta. However, this event was not publicized. 2. 1844 On December 11, Dr. Horace Wells, a dentist, inhaled nitrous oxide while a fellow dentist painlessly extracted one of Dr. Well''s teeth.
