The SciencesJune 7, 1913
The Problem of the Small Farm Tractor, A Safety Parachute for Airmen and more
Agricultural, Mechanical, and Economical Factors that Must be Considered
Stories by Lynn W. Ellis
The SciencesFebruary 10, 1912
Making the "Tractioneer"
The Successor of the Old-time Thresherman—Schools Where Traction Engineering and Farming are Taught—"Tractioneers" Who Earn from $100 to $200 a Month