Edited by C.A. Chant.

Twentieth Year of Publication.

(Note: this copy had a few ink stains.)

Preface

It had been hoped to add four, or even eight, pages to the Handbook for 1928, but it was not found possible to do so. Consequently the work follows the same lines as in recent years.

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 been assisted by Mr. R. M. Motherwell, Dominion Observatory, Ottawa, who computed the occultations of the stars by the moon; Mr. H. F. Balmer, Goodsell Observatory, Northfield, Minn.; Mr. J. A. Pearce, Dominion Astrophysical Observatory, Victoria, B.C.; Mr. R. M. Petrie, 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, 1927.       The Editor.