Excerpt from Orbit of Upsilon PerseiM l'orsci (a=4h8m-o, was announced a spectroscopic binary in 199. Which gives seven measures having a range (l' 39 km. It. Was under observation hero during the years 1913. 1914 and 1915. Forty 0ight plates in all were taken. Fourteen in 1913, eighteen in 1914 and the remainder in 1915. Oh those l'orty-eight plates the following work is based. The period. Being nxcoptionally long, - 28-1 (lnys vannot be considered very closely tlcfinvd, as the epoch lwtwoon the first of tho, Lick Observations and the last of ours covers only a little over 22 periods. The spectrum is of (i - t-ypc and a good number of lines were employed, most. Of which admit. Of fairly close measurement. Tablel gives the lines used and the elements to which they are due. The wavc-lengths were computed by averaging the line-rcsiduals in all plates.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.