Puzzles

The winner of this month's crossword and Su Doku competitions will be published next month. The winner will receive £60 worth of goods from Fortnum and Mason and two runners up will receive £20 book vouchers, please send your completed entries to:

Chemistry World
Royal Society of Chemistry
Thomas Graham House
Science Park
Milton Road
Cambridge
CB4 0WF
UK

Fax: +44 (0)1223 426017 

by 15 December.