The Case-hardening, Annealing And Tem Pering Of Steel.

(Concluded from Page 6.) Annealing. During the processes of rolling and forging, and its subsequent machining, steel is subjected to various strains; these strains produce......

From Our Berlin Correspondent.

Berlin's fire-extinguishing plant and arrangements are now reckoned amongst the " sights " of the metropolis, displays being usually organized by the go-ahead chief of the fire......