author
b. 1882
A practical early-20th-century voice on dental health, he wrote for general readers about how everyday care of the teeth and mouth supports overall well-being. His best-known surviving work, Teeth and Mouth Hygiene, turns preventive dentistry into clear, usable advice.

by Louis Reiss, William J. (William John) Fielding
Louis Reiss was an early 20th-century author remembered for Teeth and Mouth Hygiene, a concise health guide later preserved by Project Gutenberg and other library collections. The book was written with William J. Fielding and explains dental care in plain language for a broad audience.
His writing centers on prevention: regular cleaning, healthy habits, and the idea that care of the mouth matters to the health of the whole body. That practical, educational approach makes his work feel close to the tradition of popular health handbooks meant to bring professional knowledge to everyday readers.
Beyond the fact that he was born in 1882, I could not confirm many reliable biographical details from the sources I found. No suitable verified portrait image was available from the pages consulted, so none is included here.