Abstract
The second order spectra of these elements have been photographed along with first order iron lines with a two meter vacuum grating. Between 1900 and 1500A values are found for the aluminum lines which check very closely the work of Bowen and Ingram. The silicon wave-lengths are 1816.922, 1808.01, 1533.42 and 1526.71. For bismuth the values are 1902.33, 1823.71, 1791.82, 1787.39 and 1777.01. These values are believed to be accurate to within about 0.02A.