By Jesse Poundstone. AUGUST, 1895. ASTRONOMICAL PHOTOGRAPHY. Edward Erver on BY PROF. E. E. BARNARD. = [Lick Observatory.] A BRIEF HISTORICAL REVIEW. O VAST and import. That the rapid increase of interest in celestial photography and the wonderful success it has but so recently attained are due to the introduction of the dry-plate method, no one will question who is familiar with the difficulties that have been surmounted. The wet process offered but little inducement to the astronomer, except for picturing the sun, the moon, and the brighter fixed stars. That this much was of no little consequence is fully attested by the admirable work of Rutherfurd, Janssen and Gould in these several departments. In the first stages of the photographic art, there was little promise of the remarkable re No. 2. sults that have since been gradually obtained in all departments of photography through successive and rather slow stages of development. At the first dawn of this process, astronomers were quick in the attempt to apply its mysterious power to the delineation of the forms of the various celestial bodies. THE 6 IN WILLARD PORTRAIT LENS MOUNTED ON THE Copyright, 1805. Entered as Second Class Matter at the New York, N. Y., Post Office |