Massachusetts Institute of Technology. Spectroscopy Laboratory

• Massachusetts Institute of Technology wavelength tables with intensities in arc, spark, or discharge tube of more than 100,000 spectrum lines
• Massachusetts Institute of Technology wavelength tables, with intensities in arc, spark, or discharge tube of more than 100,000 spectrum lines most strongly emitted by the atomic elements under normal conditions of excitation between 10,000 A. and 2000 A.