Word: stellar
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...station in Peru, observations have been made along new and unique lines of work with the Henry Draper Memorial instruments. First, the spectra of large numbers of stars have been photographed simultaneously, with the result that large numbers of objects having peculiar spectra have been discovered. Secondly, stellar spectra, six inches long, and showing several hundred lines, have been obtained, demonstrating that large numbers of stars have identical spectra. Thirdly, photographs of the entire sky have been taken night after night, which, with the photographs taken in previous years, furninsh a complete history of the heavens since...
...immediately to erect an extension to the building in which the 115,000 valuable photographic negatives belonging to the Observatory are kept. The present building's accommodations have for a long time been insufficient for the housing of this collection of negatives which furnish a history of the entire stellar universe for the past twelve years and which is not duplicated anywhere in the world...
...portion of the remaining $10,000 is to be employed at once in a minute study of the stellar photographs, and the remainder will be set aside as a reserve fund...
...speaking of the work of the Harvard Observatory in the department of stellar photography, Professor Pickering briefly went over some of the facts in its development. The first photographs that were made of the stars were taken fifty years ago by Professor George R. Bond, with wet plates. Seventeen years ago Professor Pickering began obtaining appropriations for further experiments in the same direction, and successive good results have made the investigations very large. Photographic telescopes have been employed at Arequipa, Peru, and at Cambridge, and in the former place two tons of glass in the form of photographic plates have...
...Henry Draper. To be expended by the Director of the Observatory in the research of photographing stellar spectra...