Show production OF CLAY IN 1924 the output of clay m mined ined and sold as clay in the united states in 1924 amounted to short tons valued at or a ton according to jefferson mi middleton addleton of the bureau of mines department of commerce these show an increase of about seven per cent in quantity figures with those of 1923 and three per cent in value as compared represent only clay sold as clay or mined under royalty they and do not include thea the much nuch greater quantity of clay that was burned into clay products by the producers themselves from their own properties the united states geological geologic a I 1 collected by the data were in operation cooperation co with state g geological mo logical surveys of alabama survey florida georgia illinois iowa maryland michigan new york north carolina virginia new jersey missouri before the transfer of the mineral and wisconsin washington Vas hington to the bureau eral resources division of the geological survey of mines kaolin and fire clay that is used in making the clay kaolin the output t of oilcloth high grade pottery an and d aint aimas as well as paper and other products and is generally considered the highest grade of clay amounted to tons valued at 2923 a decrease of three per cent in quantity as compared with 1923 with practically the same value as for 1923 the clay of largest production and value is fire clay the output of fire clay was the largest ever recorded tons and was six per cent greater than that of 1923 and three per cent greater than that of 1917 the year of largest outputs output previous to 1924 the value of the fire clay output of 1924 was an increase of 2 per cent as compared with 1923 but a decrease of five per cent as compared with 1920 the year of greatest value of fire clay the output of clay of every kind decreased in quantity and value in 1924 except fire clay and miscellaneous clay which consists largely of clays used for heavy clay products such as building and drainage materials imports and exports of clay the imports of clay increased in quantity and value in 1924 as compared with 1923 and the exports decreased in quantity but increased in value the imports of clay amounted to short tons valued at an increase of 13 per cent in quantity and 8 per cent in value exports of clay in 1924 amounted to tons valued at this was a decrease of 14 per cent in quantity and an increase of 16 per cent in value as compared with 1923 kaolin or china clay constituted 80 per cent of the total imports in 1924 fire clay the principal clay exported amounted to 57 per cent of the total |