Front matter
Reading edition
AGENTS
AMERICA . . THE MACMILLAN COMPANY 64 & 66 Fifth Avenue, NEW YORK
CANADA . . THE MACMILLAN COMPANY OF CANADA, LTD. 27 Richmond Street, TORONTO
INDIA . . . MACMILLAN & COMPANY, LTD. 12 Bank Street, BOMBAY 7 New China Bazaar Street, CALCUTTA
PLATE I.
The 40-inch Refractor of the Yerkes Observatory.