Edited by C.A. Chant.

Twenty-Second Year of Publication.

Preface

The present issue of the Handbook is similar to those of recent past years. The chief improvement this year is a new table of “Distances of the Stars” (p. 61). It may be stated that four circular star-maps, 9 inches in diameter, roughly for the four seasons, may be obtained from the Director of University Extension, University of Toronto, for one cent each; also a set of 12 circular maps, 5 inches in diameter, with brief explanation, is supplied by Popular Astronomy, Northfield, Minn., for 15 cents. Besides these may be mentioned Young’s Uranography, containing four maps with R.A. and Decl. circles and excellent descriptions of the constellations, price 72 cents; Norton's Star Atlas and Telescopic Handbook (10s. 6d.); Olcott’s A Field-book of the Stars ($1.50); McKready’s A Beginner's Star Book ($5.00).

In the preparation of this Handbook the Editor has received great assistance from Miss M. S. Burland, Mr. R. M. Motherwell and Dr. R. J. McDiarmid, of the Dominion Observatory, Ottawa; Mr. J. A. Pearce, of the Dominion Astrophysical Observatory, Victoria, B.C.; and his colleague, Dr. R. K. Young, of the University of Toronto.

The minima of Algol have been computed from an observation by Stebbins (Ap. J., vol. 53, 1921), J.D. 2422619.7866 with the period 2.86731077, given by Hellerick (A.N., vol. 209, p. 227, 1919).

Toronto, December, 1929.       The Editor.