In his article in the Astrophysical Journal for January, 1919 (49, 1-23) Professor Barnard gave a list of 182 dark objects in the sky. For the convenience of the user of this Atlas this catalogue is printed here. Three of the objects in that list have been omitted here, viz., Nos. 52, 131a, and 172, because by inadvertence the same object had been listed twice.
Mr. Barnard had begun a second list, most of the objects for which he had himself selected. Their positions were determined by Miss Calvert. It seemed best to begin the second list with No. 201; accordingly, there are no objects having the numbers from 176 to 200.
Where the space in the column for description was insufficient, a note has been added at the end of the catalogue, and this is indicated by a dagger (†) at the end of the last column.
Each dark object of the list falling within the field of a plate has been sketched in by Miss Calvert, with its number, on the corresponding chart in Part II. Where these objects have been referred to, in the descriptions of the photographs, and on the charts and in the tables, their numbers have been preceded by the letter “B.”