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HISTORY
OF THE
    HARVARD COLLEGE OBSERVATORY
During the Period 1840–1890.
BY
    DANIEL W. BAKER.  
Reprinted from the Boston Evening Traveller.
    CAMBRIDGE.
    1890.  
PREFACE.
A careful study of the early history of the Harvard College Observatory    has been made by Mr. Daniel W. Baker.    Many facts were thus    brought to light which had not appeared in print. A series of newspaper    articles was accordingly prepared, which were published in the Boston    “Evening Traveller” on six successive Saturdays, beginning August 2,    1890. Much of this material appearing to be of sufficient value for    preservation in a more permanent form, it has been reprinted in the    present pamphlet, with slight alterations, and with the addition of    the illustrations given on page 25. The parts numbered IV. and V.    originally appeared together as a single article. Reproductions have    been made of some of the illustrations. The articles were originally    addressed, not to professional astronomers, but to the general    public, and are to be regarded as a popular description of the work    accomplished at the Harvard College Observatory during the first fifty    years of its existence.  
EDWARD C. PICKERING.
Harvard College Observatory,
September 13, 1890.
HISTORY
OF
    THE HARVARD COLLEGE OBSERVATORY.
1840–1890.
The present is the semi-centennial year of the Harvard College    Observatory. A precise date cannot be named for the beginning, but    in the early months of the year 1840 the institution was gradually    organized, and before midsummer became a tangible fact and a working    adjunct of the college.  
    While the first astronomical observation is of record Dec. 31, 1839,    it is well known that the observatory had not then an official staff,    the appointment of the first director being of date Feb. 12, 1840, and    the confirmation by the Board of Overseers somewhat later. Moreover,    this particular observation and others immediately following were made    in continuation of work begun elsewhere and not identified with the    college affairs.  
    The advance made in astronomical science during the 50 years past is    among the wonderful facts comprised in the record of the 19th century,    and it is true that since it became fairly organized and equipped,    Harvard College Observatory has been in the front rank in the march.    A review of this progress so far as pertaining to the institution at    Cambridge, is, therefore, timely. A history of 50 years, embodying so    many facts of the first importance and interest as does this, cannot,    even with the most resolute purpose as respects bre                        
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