COLUMBIA UNIVERSITY LIBRARIES

This book i8 due оп the date indicated or at

expiration of а defnite period after the date of bormwing,

ав provided by the rules of the Libmry or by gpcial ar-

rangement with the Libmrian in charge.

ВАТЕ BORROWED

СПИ

DATE DUE

ОПТЕ BORROWED

ОПТЕ ПИЕ