I went into several book stores yesterday and asked for some log tables. In every one I got absolutely blank faces, and in one instance the assistant gave me a look as if I'd asked for 'Nuns and Donkeys - the Illustrated Edition' (goodness knows what she thought log tables were, but I thought she was going to call the manager). Now I should mention that all the assistants I spoke to were obviously not stupid. When I got home I checked on the UK Amazon site and couldn't find any log tables in stock. I have sets of tables in the back of a couple of old textbooks so I guess I'll just copy those. Are log tables unknown to anyone under 30? (I know you can calculate logs on a calculator, but I just wanted to demonstrate how the tables worked to my son).