Images Dated 20th February 2004

Hummingbirds, historical artwork

Hummingbirds. 19th Century illustration of five different species of male hummingbird. There are approximately 340 species of hummingbird (family Trochilidae). They get their name from the characteristic hum of their rapid wing flapping, which allows them to hover in mid-air. They feed on nectar and are particularly attracted to red flowers. Illustration from Gems of Nature and Art

© SHEILA TERRY/SCIENCE PHOTO LIBRARY

Jeff Jones, left arm fast medium bowler of Glamorganshire currently battling out

Jeff Jones, left arm fast medium bowler of Glamorganshire currently battling out the County Championship - in action for his county in the vital game against Sussex, being played at Hove, to-day (Thursday).
Jones is likely to be among the players to tour Australia his winter with the M.C.C.
12 August 1965

© 2004 Topham Picturepoint

Coloured SEM of the join between a tooth and crown

Dental crown. Coloured scanning electron microgr- aph (SEM) of the join between a tooth (green) and a dental crown (light blue). The tooth and ceramic crown are coated in debris (orange) which became attached to the tooth when it was extracted for this SEM. If the top of a tooth is badly cracked, decayed or broken, it must be replaced by an artificial crown. The remaining undamaged part of the tooth is cut down to a peg to receive the hollow crown. This crown is then shaped to form a replica of the original tooth and cemented in place. Here, the crack between the tooth and crown allows bacteria to enter and cause secondary tooth decay. Magnification: x50 at 6x7cm size

© VOLKER STEGER/SCIENCE PHOTO LIBRARY