Results of the on-going evaluation programme show that there are substantial reserves of ball clay, silica, sand, kaolin, limestone and granite.
22.
By contrast, the principal ball clay workings were in the area between River Frome and the south side of Poole Harbour.
23.
The stoneware clay that Norstad Pottery mixed was a combination of Kentucky ball clay, California fire clay, and grog-a sand like material.
24.
To the north of the ridge are several areas of heathland, which in many places have been excavated for Purbeck Ball Clay.
25.
As the ball clay ripened it acquired plasticity and became suitable to mix with various other clays which made them more plastic.
26.
Furzebrook became the centre of the clay industry as all the local Purbeck Ball Clay was taken there to ripen by exposing.
27.
His father's wealth obtained from selling Purbeck ball clay enabled Lodge to attend physics lectures in London and attend the local Wedgwood Institute.
28.
Wedgwood remained the major recipient of the ball clay until 1815, after which trade was established with other pottery manufacturers and other ports.
29.
The railway was originally built as a narrow-gauge freight line to carry ball clay to Torrington from the Marland and Meeth clay pits.
30.
With the coming of the railway from Wareham to Swanage, most ball clay was dispatched by rail, often to the Potteries district of Staffordshire.
