Faraday / four theories (IMAGE) Universiteit van Amsterdam Caption Left: Michael Faraday during one of his Christmas Lectures. Image: Alexander Blaikley. Right: A schematic display of the four theories that can describe the sticking effect of ice. Source: ‘Sintering and microstructure of ice: a review’, Jane R. Blackford. Credit Alexander Blaikley / Jane R. Blackford Usage Restrictions No restrictions. License Public Domain Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.