Mechanigraph of the Grass Hopper Steam Carriage by Harry Levey. When faced with the need to demonstrate the inner workings of the latest consumer must-have – from the inhalatory heart of a vortex-driven vacuum cleaner to the gas-flattening wonders of your favourite antacid  – television advertisers have invariably turned to that old faithful: the animated … Continue reading The Animated Wonders of the Industrial Mechanigraph