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.
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