Louis Thomas Yarbrough (1873 - 1951) was a member of the first graduating class at North Carolina College of Agriculture and Mechanic Arts (later North Carolina State University) in 1893, and presented his thesis titled "Water Wheel Construction" for the completion of a bachelor's degree in education. He was a United States postal inspector for more than 37 years.
From the description of Water wheel construction : thesis, 1893 / by Louis Thomas Yarbrough. (North Carolina State University). WorldCat record id: 468801388