Entered according to Act of Congress, in the year 1886, by

JOHN F. GENUNG,

in the Office of the Librarian of Congress at Washington.

TYPOGRAPHY BY J. S. CUSHING & Co., BOSTON, U.S.A.

PRESSWORK BY GINN & Co., Boston, U.S.A.

ΤΟ

my friend and colleague,

H. Humphrey Neill,

in pleasant recollection

of the points we have discussed and the plans we have made together,

in the sphere of study to which this book aspires to contribute.

200220