(vi) potential ignition sources (including electrical equipment).

The world economy, as John Maynard Keynes put it 75 years ago, is developing magneto trouble.

Examples Gasoline (petrol) is a fuel for use in a spark ignition engine.

Safety actions are necessarily linked to the type of hazard which exists, e.g., flammable liquids should be stored away from ignition sources.

To design a safer machine with its structure around the engine, the pair wrote to German ignition specialist Robert Bosch for advice on a different electromagnetic system.

The National Ignition Facility, or NIF, is a large laser based inertial confinement fusion (ICF) research device, located at the Lawrence Livermore National Laboratory in Livermore, California.

A small number of large scale nuclear fusion systems also exist including the National Ignition Facility in the USA, JET in the UK, and soon the recently started ITER experiment in France.

L. Wegel, Theory of magneto mechanical systems as applied to telephone receivers and similar structures , Journal of the American Institute of Electrical Engineers , vol.40, pp.791 802, 1921. ref Sound reproduction An early application of these new theoretical tools was in phonographic sound reproduction.

Typical analysis of perlite 70 75 silicon dioxide SiO2 12 15 aluminium oxide Al2O3 3 4 sodium oxide Na2O 3 5 potassium oxide K2O 0.5 2 iron oxide Fe2O3 0.2 0.7 magnesium oxide MgO 0.5 1.5 calcium oxide CaO 3 5 loss on ignition (chemical combined water) Substitutes Perlite can be substituted for all of its uses.

See also Laser Mégajoule Nuclear fusion Nuclear reactor Chain reaction Notes References External links How NIF Works National Ignition Facility homepage NIF Director, Dr Ed Moses, on the progress of the facility, Ingenia magazine, December 2007 NIF project director Moses says facility is ready to go, SPIE Newsroom, March 23, 2009 Inside Livermore Lab's Race to Invent Clean Energy Newsweek, November 14, 2009