molybdena

I carefully examined all the minerals which this stratum contains, -- felspar, mica, and quartz molybdena, and iron pyrites, -- and I found all similar to those I had previously got adhering to rough rubies offered for sale at Colombo.

Ceylon; an Account of the Island Physical, Historical, and Topographical with Notices of Its Natural History, Antiquities and Productions, Volume 1 (of 2) James Emerson Tennent 1836

There are five metals, arsenic, molybdena, chrome, tungsten, and columbium, which are susceptible of combining with a sufficient quantity of oxygen to be converted into acids.

Conversations on Chemistry, V. 1-2 In Which the Elements of that Science Are Familiarly Explained and Illustrated by Experiments 1813

Sative and grey copper ore occur near Stanardsville and Nieiiolson's Gap, disse - mmated in a hornldende and epidoie joik, bordering on the tran - sition; molybdena is found at Brunswick, Alaine; Chester, Penn - sylvania; Virginia; North Carolina, &c.

Transactions of the American Philosophical Society 1771

Dr. Gygax says: "I found at Hima Pohura, on the south-eastern decline of the Pettigalle-Kanda, about the middle of the descent, a stratum of grey granite containing, with iron pyrites and molybdena, innumerable rubies from one-tenth to a fourth of an inch in diameter, and of a fine rose colour, but split and falling to powder.

Ceylon; an Account of the Island Physical, Historical, and Topographical with Notices of Its Natural History, Antiquities and Productions, Volume 1 (of 2) James Emerson Tennent 1836

"But there is another description of iron ore," says Dr. Gygax, in his official report to the Ceylon Government, "which is found in vast abundance, brown and compact, generally in the state of carbonate, though still blended with a little chrome, and often molybdena.

Ceylon; an Account of the Island Physical, Historical, and Topographical with Notices of Its Natural History, Antiquities and Productions, Volume 1 (of 2) James Emerson Tennent 1836