Graphite is a naturally-occurring form of crystalline carbon. It is a native element mineral found in metamorphic and igneous rocks. Graphite is a mineral of extremes.It is extremely soft, cleaves with very light pressure and has a very low specific gravity.hat remains is a nearly pure carbon material that crystallizes into mineral graphite. This graphite occurs in seams that correspond to the original layer of coal. When mined the material is known as amorphous graphite. The word amorphous is actually incorrect in this usage as it does have a crystalline structure.
O Captain! My Captain! Written on the occasion Abraham Lincolnâs assassination, âO Captain! My Captain!â was first published in the New York Saturday Press (November 1865) and was later included, along with âWhen Lilacs Last in the Dooryard Bloomâd,â in a group of poems titled âSequelâ to Drum Taps (1865).
Was James Cook really a Captain? When Cook set sail in 1768 on his first voyage of discovery aboard Endeavour he held the rank of lieutenant. Soon after his return to England in 1771 he was promoted to the rank of commander. He never actually held the rank of captain, but in 1775 was promoted to the higher rank of post-captain. Any person in charge of a ship is known as its captain, and so it was quite natural to refer to him as Captain Cook.