Читать книгу Inventors at Work, with Chapters on Discovery - George Iles - Страница 47

Table of Contents

Edge tools old and new … Cutting a ring is easier than cutting away a whole circle … Lathes, planers, shapers, and milling machines far outspeed the hand … Abrasive wheels and presses supersede old appliances … Use creates beauty … Convenience in use … Ingenuity may be spurred by poverty in resources.