1.   It is located throughout the grains of minerals that contain traces of uranium and thorium, not on grain surfaces.

2.   The flattened rectangular section behind the neck contains traces of a large iron blade, possibly a double-edged dagger or short sword.

3.   The result is a fine-grained rock containing small traces of metallic iron.

4.   Recent work on the silver coinage has revealed a complex system of which even Domesday contains little trace.

5.   His body contained traces of amphetamines and cannabis.

6.   American officials had said the samples contained traces of Empta, a precursor used in the production of deadly VX nerve gas.

7.   And by October, any story containing a trace of maturity will be a godsend.

8.   Another recall involved a drug that contained traces of a drug that should not have been in the product.

9.   As workers search through the rubble, they must sift every handful to see whether it contains any traces either of human beings or of forensic evidence.