By distilling bituminous coal in retorts to obtain gas for illumination, or by burning it in kilns or pits, the residue left behind is called coke, which is simply coal charcoal, and is nearly ...

They’re particularly interested in how the Indians’ health changes as they move away from their traditional diet and active ... the Pima Indians of the American Southwest, and the Bantu ...

One of the loudest and most colorful birds of eastern back yards and woodlots, the Blue Jay is unmistakable. Intelligent and adaptable, it may feed on almost anything, and it is quick to take ...