This detail about his education appeared in his obituary when he died in 1977 at the age of 81. However, since information in obituaries can be incorrect, I wanted to verify his degree. If you have a dentist in your family tree and don't know where he went to school, perhaps this may help you, too.
One source of information is a publication called The Dental Cosmos. Not all years are available in Google Books, but the 1922 issue that I needed is out there. I searched for William's name and, sure enough, he's one of 77 gentlemen that year who received the degree of Doctor of Dental Surgery from the School of Dentistry of the University of Pittsburgh.
You could also look for specific state or national directories online such as in the HathiTrust Digital Library. Many of these directories provide the school and year of each dentist's degree. Just a few of the publications I found include:
- Polk's Dental Register and Directory of the United States and Canada (various years from 1898 to 1917 but not all)
- Registered Dentists in Ohio, December 31, 1925 to December 31, 1930
- The Vermont Medical Register, For the Year 1877 (although most dentists listed didn't have degrees)
- The Canadian Dental Directory, 1909
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