William T.G. Morton, a Boston dentist, administered the anesthetic to patient Gilbert Abbott. Abbott then was rendered unconscious in the operating theater on the top floor of the Bulfinch Building. MGH co-founder John Collins Warren, MD, surgically removed the vascular tumor from Abbott's jaw in a pain-free procedure and made his famous statement: "Gentlemen, this is no humbug."

The procedure inspired an MGH tradition that still is celebrated today Ñ Ether Day. For the past 56 years, the MGH has selected a day in October, close to the anniversary of the first demonstration of ether, to honor and recognize MGH employees and staff for their dedication, commitment and length of service to the hospital.

This year's annual Ether Day celebration is held Oct. 12, with a reception in the Bulfinch Tent featuring refreshments and Ether Day photographs, courtesy of "Images" by Bob DiCaprio. A special presentation honors the more than 1,500 employees and staff who have worked at the hospital for 5, 10, 15, 20, 25, 30, 35, 40, 45, 50 and 60 years. The 35- and 45-year categories were added this year. The honored employees receive pins and colored flowers distinguishing years of service.

This year, the honorees fall into the following categories: