THE seventh spectroscopy conference will be held at the George Eastman Research Laboratories of the Massachusetts Institute of Technology during July 17-19. Papers and discussions on analysis of material by the emission spectrum, absorption spectrophotometry, photographic photometry, biological and chemical effects of spectral radiation, and industrial applications of spectroscopy, are being prepared. Copies of the detailed programme of the conference will be sent on request to anyone interested, but as the attendance at the conference is limited to two hundred, those expecting to attend from a distance are urged to signify in advance their intention of being present. No fee is charged. The usual summer courses on practical and applied spectroscopy will be offered at the Institute during June 12-July 22. Further information can be obtained from Prof. George R. Harrison, Department of Physics, Massachusetts Institute of Technology, Cambridge, Mass.