Reviews Fifty Machines That Changed the Course of History by Eric Chaline Share this: Share via email (Opens in new window) Email Click to share on Facebook (Opens in new window) Facebook Click to share on Reddit (Opens in new window) Reddit Click to share on X (Opens in new window) X Click to print (Opens in new window) Print By Science News February 21, 2013 at 9:28 am Review key inventions of the 19th and 20th centuries, from bicycles to the Underwood typewriter. Firefly, 2012, 224 p., $29.95