I like," said Emerson, "dry light, and hard clouds, hard expressions ... than the ecstasies described in his first book, Nature. For Emerson's conception of himself was not as a solitary walker ...

The hard X-ray FEL has come of age. A free-electron laser is not like other lasers. It works by forcing a beam of electrons, travelling at nearly the speed of light, to oscillate in a long ...