Natural philosophy. being a hand-book of chemical physics, or, The physics of heat, light and electricity
A school handbook of chemical physics covering heat, light and electricity, written by John Herbert Sangster and printed by Lovell in Montreal in 1872 for Canadian students. Its wood-engraved diagrams trace rays through mirrors, prisms and lenses in fine ruled lines, with lettered points and hatched apparatus — usable as ready-made optical schematics and line-and-label motifs.
