This online version of Kaye & Laby Tables of Physics & Chemical Constants includes the entire contents of the 16th edition, as well as a new section 3.9.5 on pH values, and is full of tables of data, formulae, graphs and charts. This information spans topics from fundamental constants to fibre optics, superconductivity to Raman spectroscopy and many many others. The contents are periodically updated to reflect advances and developments in the fields of physics and chemistry. This free resource is hosted by the National Physical Laboratory at http://www.kayelaby.npl.co.uk/
