XIII. THE ASTRONOMICAL EPHEMERIS AND NAUTICAL ALMANAC
XIV. THE WORLD'S DEBT TO ASTRONOMY
XV. AN ASTRONOMICAL FRIENDSHIP
XVI. THE EVOLUTION OF THE SCIENTIFIC INVESTIGATOR
XVII. THE EVOLUTION OF ASTRONOMICAL KNOWLEDGE
XVIII. ASPECTS OF AMERICAN ASTRONOMY
XIX. THE UNIVERSE AS AN ORGANISM
XX. THE RELATION OF SCIENTIFIC METHOD TO SOCIAL PROGRESS
XXI. THE OUTLOOK FOR THE FLYING-MACHINE




ILLUSTRATIONS

SIMON NEWCOMB

PHOTOGRAPH OP THE CORONA OP THE SUN, TAKEN IN TRIPOLI DURING TOTAL
ECLIPSE OF AUGUST 30, 1905.

A TYPICAL STAR CLUSTER-CENTAURI

THE GLASS DISK

THE OPTICIAN'S TOOL

THE OPTICIAN'S TOOL

GRINDING A LARGE LENS