Exhibition Trix & Robert Haussmann. The Log-O-Rithmic Slide Rule: A Retrospective 14 Jul 2018 – 07 Oct 2018 Save / follow 2 I've seen this Comment on Trix & Robert Haussmann. The Log-O-Rithmic Slide Rule: A Retrospective Share Trix & Robert Haussmann. The Log-O-Rithmic Slide Rule: A Retrospective with your friends Nottingham Contemporary Nottingham, United Kingdom