The Clock and the Camshaft Bradford R. Kane Provenance takes the reader through

Provenance takes the reader through progressive historical discoveries to the sources of a Hungarian painting that escaped the grasping fingers of Nazis and Communists

sometimes even more so than we do with our friends and loved ones

yet lively

and improving civics education

The Clock and the Camshaft Bradford R. Kane Provenance takes the reader throughHighlights the importance of medieval innovations as the basis for later technological progress This history of medieval inventions, focusing on the eleventh to the fourteenth centuries, vividly portrays a thriving era of human ingenuity and the results are still being felt to this day. From the mechanical clock to the first eyeglasses, both of which revolutionized society, many of the commonplace devices we now take for granted had their origin in