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Percival Everett (b. 1956) writes novels, short stories, poetry, and essays and is one of the most prolific, acclaimed, yet under-examined African American writers working today. Although to date Everett has published eighteen novels, three collections of short fiction, three poetry collections, and one children's book, his work has not garnered the critical attention that it deserves. Perhaps one of the most vexing problems scholars have had in trying to situate Everett's work is that they have found it difficult to place him and his work within a prescribed African American literary...

Percival Everett (b. 1956) writes novels, short stories, poetry, and essays and is one of the most prolific, acclaimed, yet under-examined African American writers working today. Although to date Everett has published eighteen novels, three collections of short fiction, three poetry collections, and one children's book, his work has not garnered the critical attention that it deserves. Perhaps one of the most vexing problems scholars have had in trying to situate Everett's work is that they have found it difficult to place him and his work within a prescribed African American literary...

The first book devoted exclusively to the spectroscope and its use in gemstone identification.

Until 1933 the refractometer and the microscope were the two principal tools in gem testing. Then B.W. Anderson introduced the hand spectroscope which quickly became the third vital instrument for the UK gemmologist. The publication of Anderson's papers in the mid-1950s alerted gem laboratories worldwide to the importance of this instrument. Today its use is universal.

Anderson and his lifelong colleague, Payne, both of the world's first full-time gemmological laboratory, were...

The first book devoted exclusively to the spectroscope and its use in gemstone identification.

Until 1933 the refractometer and the microscope were the two principal tools in gem testing. Then B.W. Anderson introduced the hand spectroscope which quickly became the third vital instrument for the UK gemmologist. The publication of Anderson's papers in the mid-1950s alerted gem laboratories worldwide to the importance of this instrument. Today its use is universal.

Anderson and his lifelong colleague, Payne, both of the world's first full-time gemmological laboratory, were...

Helmholtz's seminal paper on vortex motion (1858) marks the beginning of what is now called topological fluid mechanics.After 150 years of work, the field has grown considerably. In the last several decades unexpected developments have given topological fluid mechanics new impetus, benefiting from the impressive progress in knot theory and geometric topology on the one hand, and in mathematical and computational fluid dynamics on the other.

This volume contains a wide-ranging collection of up-to-date, valuable research papers written by some of the most eminent experts in...