CHICAGO

LIBRARIES

Director of the Chamberlin Observatory, University of Denver; author of
"Elements of Descriptive Astronomy."

NEW YORK

CHARLES SCRIBNER'S SONS

1902

N8

Copyright, 1896

By FLOOD & VINCENT

THE CAXTON PRESS

NEW YORK,

-

TO HUNDREDS OF MY PUPILS,

WHOSE STEADFAST DEVOTION

TO THEIR DAILY TASKS

IS A DELIGHTFUL MEMORY.

THIS BOOK IS

AFFECTIONATELY DEDICATED