There are manganese mines in the vicinity.

This chemical is a salt, made by roasting wolfram with soda ash, and wolfram is a native tungstate of iron and manganese.

At the latter place he published in the papers an account of the discovery of a body of the black oxide of manganese, on the banks of the Great Sandy River of Kentucky, and watched the return papers from the old Atlantic States, to see whether notices of this kind would be copied and approved.

In Oriente Province also are deposits of manganese of which considerable shipments have been made.

Panduronga Timblo Industrias (PTI) had evidently also made pots of cash, particularly from its manganese mines in Rivona, Quepem.

Iron Molybdenum Nickel Sodium (11) Hydrogen Lanthanum Titanium Silicon Sodium Niobium Manganese Strontium Nickel Palladium Chromium Barium Magnesium Neodymium Cobalt Aluminum (4) Cobalt Copper Carbon (200 or more)

Cadmium Silicon Zinc Vanadium Rhodium Aluminum Cadmium Zirconium Erbium Titanium Cerium Cerium Zinc Chromium Glucinum Calcium (75 or more) Copper (2) Manganese Germanium Scandium Silver (2) Strontium Rhodium Neodymium Glucinum (2) Vanadium Silver Lanthanum

Thus, amethyst, or purple quartz, is tinged with a little iron and manganese.

Rose quartz, or false ruby, derives its colour from manganese.

Though it was apparently easy to make crucible steel castings, it was not in reality easy to make a true steel, that was to say, to make a metal that contained only the correct proportions of carbon and silicon and manganese.

The only real way to make crucible castings of true steel was to melt the proper proportions of cast steel scrap with the proper amounts of silicon and manganese to produce that chemical composition which was known to be necessary in best castings.

The substances found in the soluble inorganic matter of soils are lime, magnesia, alumina, silica, phosphoric acid, oxide of iron, oxide of manganese, potash and soda.

A botryoidal mass of ferruginous oxide of manganese, approaching to hematite; the fissures in some places occupied by carbonate of lime.

That night in the dingy little store I heard prospectors talk about float, which meant gold on the surface, and about high grade ores, zinc, copper, silver, lead, manganese, and about how borax was mined thirty years ago, and hauled out of Death Valley by teams of twenty mules.

In the N. are rainless tracts of mountains rich in copper, manganese, silver, and other metals, and deserts with wonderful deposits of nitrate.

HUELVA (19), a thriving seaport in Spain, 68 m. SW. of Seville, between the mouths of the Odiel and Tinto; fisheries and the exportation of copper, manganese, quicksilver, and wine are the chief industries.

ISLAY (7), a large mountainous Island 13 m. W. of Kintyre, Scotland; much of it is cultivated; dairy produce, cattle, and sheep are exported; there are lead, copper, and manganese mines, marble quarries, and salmon fisheries; the distilleries produce 400,000 gallons of whisky annually.

There he had been making some experiments with peroxide of manganese, a solution of which stood in a bottle on the table.

The best wearing rails, which often give contradictory results with the tensile test, were comparatively pure manganese steels, low in silicon, only exceptionally up to 0.2 per cent., but generally below 0.1 per cent., and with less than 0.1 per cent.

On the other hand, rails with a tendency to break or split are low in carbon, with variable proportions of manganese, but contain much silicon, 0.3 to 0.9 per cent., and often above 0.1 per cent. of phosphorus.

Another series of experiments upon rails for the Finland lines made by the author in 1879-80 shows the high quality of manganese steel.

manganese, and have stood three and a half years' wear without a single one being broken; while those of silicon steel with 0.106-0.144 per cent.

carbon, 0.592-0.828 manganese, and 0.423-0.435 silicon have failed in many cases, showing a great tendency to split.

The causes of the difference between the two kinds of steel the author attributes to differences in the structure of the ingot due to the agent used in "chemical consolidation," which may be either manganese or silicon, which structures are illustrated by photographs of ingot fractures.

When silicon is used there is a tendency to unsoundness about the exterior of the ingot, which is surrounded by a honeycomb-like cellular casing of greater or less depth; while with manganese the vesicular cavities are more or less dispersed through the whole substance, or concentrated toward the interior of the ingot.