Word: heavensent
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The lens used is a Voigtlander rectilinear lens, corrected and adapted to the purpose in view. The aperture of the instrument is eight inches and a field of ten degrees square in the heavens can be photographed at one exposure.
The Ladd observatory consists of a tower which is octagonal to a height of 25 feet, where a balcony is placed, and cylindrical above the balcony to an additional height of 10 feet. Within this tower which is 21 feet in diameter, rises a heavy masonry pier where an equatorial...
Mr. Bailey will go from California to Peru where a branch of the Cambridge observatory is to be established for the purpose of studying the spectra of the stars in the southern heavens, which are not visible in Cambridge.
The expedition will take complete apparatus for the important work of photographing the spectrum of the sun and in addition will carry an ingenious instrument for measuring the brightness of the corona. One of the assistants started yesterday with a large part of the apparatus, for Peru; where a thorough...
The photometric observation of stars will be performed with the same instrument and according to the same method and standard as that by which that part of the heavens visible in Cambridge, from the pole to 30 degrees south of the equator has been already surveyed. Photographs will be made...