by Erich Weidenhammer, in memory of Professor Douglas Creelman (1933-2014). The University Of Toronto Department Of Psychology’s collection of scientific material includes a humble-looking object whose purpose…
by Erich Weidenhammer In 1891, the University of Toronto equipped a psychology laboratory, the earliest in the British Empire. The Zimmerman colour variator, a precision…
by Erich Weidenhammer Provenance and Meaning Part 1 of this examination of the Chambers’ Micromanipulator, describes the technology and its various applications. This second part looks at the…
by Erich Weidenhammer [Update 20/03/2013] Part 2: “The Afterlife of a Scientific Instrument” Part 1: Descripton, Operation, Development At some point in the past several decades, the…