William Duncan McNally, Date of Birth, Place of Birth, Date of Death
TweetWilliam Duncan McNally
Date of Birth: 08-Jul-1882
Place of Birth: Saginaw, Michigan, United States
Date of Death: 29-Jun-1961
Profession: chemist
Nationality: United States
Zodiac Sign: Cancer 
About William Duncan McNally
- William Duncan McNally (July 8, 1882 – June 29, 1961) was the chief chemist in the Cook County Department of Public Health and the chief chemist for the Cook County Medical Examiner's office.
- He invented an early breathalyzer in 1927.He was a holder of M.D..
Read more at Wikipedia