Labour's Hugh Henry brought the backbench bill, saying employees such as shop-workers or train and bus conductors needed extra protection.

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There have been no reports or observations of externalized conductors in these newer Optim-insulated leads, out of over 65, 000 of these leads sold worldwide since 2008.

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"Usually, it's a note here or there or a missing dynamic indication, which will be weeded out by conductors, musicians, librarians or musicologists, " says Mr. Orenstein, a Ravel scholar of 45 years and the author of "A Ravel Reader" (1990).

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Printed electronics require conductors to create light or energy and that usually happens with calcium, magnesium or lithium.

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That done, trying the experiment with different conductors may suggest why a subtle change in the structure of an insulator or a superconductor can cause a major change in its character.

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Regardless of all of the above, one thing you should always do when traveling around China is carry with you Chinese-language business cards of your hotel or of places you wish to visit so you can show passers-by, taxi drivers, bus conductors and the like.

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