Dr. C. W. Siemens, President this year ef the Iron
and Steel Institute, and a great authority on Coal, -gave us, in his inaugural lecture -on Wednesday, an opinion which Will be pleasant to housewives. He thinks we are probably on the-edge of a period of -years during which the increase' of population and of manu- factures will be balanced, as regards the conatunirtion of coal, by new economical processes, and, thereforercoal May remain through a long cycle cheap. It is quite certain; he observes, that the con- sumption of coal does not increase pari, izessu with population ancbindustrial energy, and the reason mast be -the :one' he has assigned. The ;Doctor would, we observe-lalso,Ichespen ;gas' by making it in the mine, and thus -awing• all the labour of 'raising and transporting the necesiaaiy-coal.
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