The number of rolling mill* in use last year ' was six hundred and twelve.

In 1864 there were raised from the mines of Cornwall nnd Devonshire 13,211 tons of tin ore, the largest quantity from very deep mines. This produced of metallic tin 10,108 tons. 204,- ' 604 tens of copper were obtained in 1864, pro-1 ducing more than 13,000 tons of metaUlc cop per. In addition to this, the smelters im