'Global' knowledge was constructed, communicated and contested during the long nineteenth century in numerous ways and places. This book focuses on the life-geographies, material practices and varied contributions to knowledge, be they medical or botanical, cartographic or cultural, of actors whose lives crisscrossed an increasingly connected world. Integrating detailed archival research with broader thematic and conceptual reflection, the individual case studies use local specificity to shed light on global structures and processes, revealing the latter to be lived and experienced phenomena...

The 308 letters in this volume cover a critical period in Tyndall’s personal and scientific lives. The volume begins with the difficult ending of his relationship with the Drummond family, disputes about his work in glaciology, and his early seminal work on the absorption of radiant heat by gases. It ends with the start of his championship of Julius Robert Mayer’s work on the mechanical equivalent of heat. In between, Tyndall carefully establishes his own priority for his work on radiant heat, and he accepts the position of professor of physics at the Government School of Mines. The lure...