1^ 
4 
Mathem.^tn:' 
Sciences 
PREFxlCE. 
The investigation involved in this memoir is an extension of the 
stellar catalogue presented in Publication No. i of the Vassar College 
Observator}'. Publication No. i gives a catalogue of stars within 
one degree of the north pole. Publication No. 2 extends the cata- 
logue to two degrees from the pole. Both catalogues are based upon 
photographs taken by Professor Donner of Helsingfors, Finland, 
and secured through the courtesy of Professor Jacoby of Columbia 
University. The direction of the measuring and reduction of the 
plates has been in the hands of Carohne E. Furness, Ph. D., assist- 
ant in the observatory. The observations for magnitude, photo- 
graphic and visual, made after the manner described in the text, 
were carried on by the director. The computing corps has consisted 
mainly of graduates of Vassar College, of whom Miss M. E. Tarbox 
and Miss B. Tompkins have rendered especial service. 
The major part of the expense of the reduction has been met by a 
grant from the Carnegie Institution of Washington, D. C. 
MARY W. WHITNEY, 
Director of Observatory. 
Vassar College, June, 1905. 
