vintage leather bound textbooks Mechanical & Electrical Engineering Scranton technical course books early 1900s

Lot of two very old books for the study of Mechanical and Electrical Engineering, Scranton, no dates that I could find. Early 1900s, I think? Lovely antique leather bindings are very worn (spines missing) and crumbling, though the pages are complete. Each book covers different material of the same mechanical and electrical engineering course.