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acid Amount apparatus blast blast-furnaces Camborne Caradon cast-iron chasers Clifford Amalgamated close coal coke colliery Company have received Consols Copper Cornwall Crofty Crown Copper cwts declined demand deposit Devon district ditto ditto exports fathom furnace gold Gonamena granite Grylls hearth improved increase iron and steel iron trade Kapunda Keates Kelly Bray lead lode Manufacture of iron Marke Valley Mason and Elkington Messrs metal metres mineral Mining Company Newton North Country coal North Downs obtained opened oxide Parker Patents Penclawdd Penclawdd Copper Pendeen pig-iron plates present puddling puddling furnaces PURCHASE quantity Redruth reported rocks Rosewarne shaft shares ships silver smelters smelting South Tolgus South Wales Staffordshire sulphur tons of coal tons of iron Treloweth Treskerby twyers Vivian and Sons Wales Walker Wallsend Welsh West Basset West Chiverton Wheal Basset Wheal Busy Wheal Rose Wheal Seton Williams winze worth zinc
Page 344 - MINES.— Rogers' Law relating to Mines, Minerals, and Quarries in Great Britain and Ireland ; with a Summary of the Laws of Foreign States and Practical Directions for obtaining Government Grants to work Foreign Mines.
Page 338 - On the Means of Utilising the Products of the Distillation of Coal, so as to reduce the price of Coke ; with descriptions of the Ovens, and of the best Processes in use in Great Britain and on the Continent in the Manufacture of Coke.
Page 154 - This machine made 2| strokes per minute, and was capable of supplying about 20 cubic feet of air, compressed to five atmospheres, per minute. The other machine consisted of a horizontal pump and two vertical branches. The piston was surrounded by water, which rose and fell alternately in the two columns : when it rose...
Page 258 - DE LA BECHE.-REPORT ON THE GEOLOGY OF CORNWALL, DEVON, and WEST SOMERSET.
Page 19 - Work,' as herein-after used, shall mean every Work for the Manufacture of Alkali, Sulphate of Soda, or Sulphate of Potash in which Muriatic Acid Gas is evolved...
Page 326 - Erdkorpers, published in 1834, maintained that all crystalline non-stratified rocks, from granite to lava, are products of the transformation of sedimentary strata, in part very recent, and that there is no well-defined line to be drawn between Neptunian and volcanic rocks, since they pass into each other. Volcanic phenomena, according to him, have their origin not in an igneous fluid centre, nor...
Page 113 - The Right Honourable the Lords of the Committee of Privy Council for Trade have received, from the Secretary of State for Foreign Affairs, a copy of a...
Page 159 - Machine, which is the invention of Mr. Blake of Newhaven, Connecticut, is employed for breaking limestone and ore for blast furnaces and also stone for metalling roads. It is driven by steam power, and consists of a crushing hopper, in which the stone is broken between a pair of jaws, one fixed in the frame of the machine, and the other vibrating on a centre through a short distance, worked by an ordinary toggle joint and long lever which receives its motion from a crank shaft. The machine is shown...
Page 89 - When the steam begins to escape from between the surfaces of the valve, it gets between the concave and convex surfaces of the two flanges, and its force thus acts upon a larger area, and reacts upon the concave surface of the valve, and causes it to open to a greater extent than the ordinary safety-valve.