Volume of printed 'Forms No. 261' with handwritten entries for photographic plates nos D3184-D5401, made with the 13-inch Astrographic Equatorial. The register is entirely in one hand, presumably that of 'E.C'. (E.D. Clements, Astrometry Department).

Column headings are: no. of photo, date, observer, position of telescope, orient. screw and focus readings, R.A., Dec. North, Micrometer scale readings (R.A. and Dec.), clock times of exposures (begin, end, duration), barometer (external and internal therm.), plate and development, field of object, remarks, and signature. Two loose punch cards and a page of notes are inserted in the volume.