Lick Observatory Bulletins Volume 90-130 (Paperback)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1908 Excerpt: ... with the spot on the farther side of the Sun, the positionangles of the spot and apex differed 3. The form of structure within the disturbed region may be divided roughly into two classes: long, slightly curved streamers, and flocculent masses. The streamers contain no condensations or other details of structure capable of accurate measurement, as a basis for determining the velocities of the matter composing them. If the forms of the streamers are functions of the velocities within them, as considered by Professor Schaeberle, the speed in question would be as great as several hundred miles per second. A determination of the velocities of some of the flocculent masses near the limb, on the assumption that August 3 was the date of their ejectment, gives a value of 700 feet per second as the minimum radial speed. The masses farther from the limb would require velocities perhaps five times as great in order to carry them to their positions at the time of the eclipse. These results are in accordance with the conclusions based on velocity determinations during the interval of seventy minutes between the occurrence of the eclipse in Spain and Egypt. This determination showed that the velocity of the flocculent masses could not have been over one mile per second. W. W. Campbell, April, 1907. C. D. Perrine. ASTRONOMY LICK OBSERVATORY BULLETIN NUMBER 117 OBSERVATIONS OF ONE HUNDRED AND TWENTY-SEVEN NEW DOUBLE STARS. TWELFTH CATALOGUE. At the time of concluding my observational work at the Lick Observatory, at the end of May, 1905, the double stars of this Catalogue had been discovered and partially measured. They were not, however, then in shape for publication. Professor Aitken very generously volunteered to complete the sets of observations, and it is by his kind...