1.   Even in England, half-inch diameter hail stones are not unusual.

2.   Natural stone is more difficult and expensive, but the best option if you want to plant into the sides.

3.   The arch will stand once the last stone is in place, but the intermediate stages are unstable.

4.   The stone was a greyish colour.

5.   The stone was warm in the sun, its surface striated like the trunk of an ancient tree.

6.   These very weak stones are rich in water, which is bound up in both hydrated salts and clay minerals.

7.   Each stone is a nucleus which, when it strikes the surface, generates expanding circles.

8.   Much research in the pathophysiology of gall stones has been devoted to various molecular species of bile salts.

9.   In only three patients were single stones found.

10.   In the remainder, the recurrent stones were silent or asymptomatic.