Comparison of results obtained with different forms of apparatus in meridian observations

por Searle, Arthur, 1837-1920
Publicado 1902

Researches on the zodiacal light and on a photographic determination of the atmospheric absorption

por Astronomical Observatory of Harvard College
Publicado 1893

Photometric observations made principally with the equatorial telescope of fifteen inches aperture during the years 1877-79

por Pickering, Edward C. 1846-1919
Publicado 1879