The Ontario high school physics
A secondary-school physics textbook by F. W. Merchant and C. A. Chant, published in Toronto by Copp Clark in 1917 for Ontario high school classrooms. Line-engraved diagrams show magnet poles lettered N and S, armature coils with current arrows, glass-cased electroscopes and bench apparatus on turned stands, offering designers labelled schematics, hatched shading and stray-field curves.
