Tag Archives: Secure Digital

Accompany me on a road bike outing: San Gabriel River Bikeway: Destination Seal Beach River End Cafe (SPEEDIFIED X6)


Cobalt


Cobalt

Cobalt is a silver-white, lustrous, hard, brittle metal that is chemically active and rarely occurs uncombined in nature. It is, however, often found in meteoric metal. Cobalt compounds have been used for centuries to impart a rich blue color to glass, glazes, and ceramics. The element has been detected in Egyptian sculpture and Persian jewelry from the third millennium BCE. The word cobalt is derived from the German word for “goblin.” Why was the element thus named? More… Discuss

word: lucid


lucid 

Definition: (adjective) Mentally sound; sane or rational.
Synonyms: coherent, logical
Usage: Most of the time, he just muttered incomprehensibly to himself, but in his occasional lucid moments, he was an engaging conversationalist. Discuss.