"After many years of skepticism and neglect, applied spectroscopy is coming into its own. Each summer conference brings new proof that spectrum analysis is here to stay and that new problems and improvements in technic will ever widen its usefulness" says W. F. Meggers of the National Bureau of Standards. He might have added that spectrochemical analysis already plays an important part in the clinical laboratories of many hospitals. The pamphlet contains summaries of talks given at the yearly conferences of the Massachusetts Institute of Technology and represents the experience and the announcement of new developments in spectroscopy. It is a reference and laboratory book for all those who are interested in the subject.