The Phillips Machine ( MONIAC ) - Demonstrated by Professor Allan McRobie 

Allan McRobie, Professor of Structural Engineering (Dept of Engineering, Cambridge), demonstrates "The Phillips Machine". This was filmed in the Faculty of Economics, during the Alumni Week activities in September 2010.
The Phillips Machine was invented in the 1950's by William (Bill) Phillips to calculate the workings of the UK national economy using water. It is also known as a MONIAC (Monetary National Income Analogue Computer)