Inventions of Mr. Siemens.

The furnace invented by the Messrs. Siemens is another highly successful contrivance. In melting one ton of steel in pots, 2½ tons of coke are ordinarily consumed. In Messrs. Siemens’ furnace, a ton of steel is melted with 12 cwt. of small coal.

When such results as this have been secured by a few inventors, what may we not venture to expect from the concentration of many ingenious minds on the important problem of economising coal?