A practical self-instruction manual that guides readers through learning mechanical drawing for industrial use. It explains basic techniques — chalk-work, freehand sketching, instrumental drafting, geometric constructions, and perspective — and emphasizes drawing to scale and accuracy. Sections describe tools, instruments, board work, and step-by-step exercises, with advice on persistence, first principles, and when to seek hands-on help from experienced draughtsmen. The text also outlines the draughtsman’s roles in design and production, how to read drawings, and uses sketching for quick communication in workshops, aiming to equip learners with the skills to produce clear, functional technical illustrations.