& Kenney

Truston

ny.

Ithaca Jan, 1881

STANFORD UNIVERSITY LIBRARIES

plam from (5) and if in the retex vanny

(3)

; cm} += sh} it use come from

ich

sin s

(3) (stabove.
уставной

ch = hyperbolic cosine

{-i [from (3)], or in Purcis by

= 4,8104 77381,

DIFFERENTIAL EQUATIONS.

GEORGE BOOLE, F.R.S.

PROFESSOR OF MATHEMATICS IN THE QUEEN'S UNIVERSITY, IRELAND,

HONORARY MEMBER OF THE CAMBRIDGE PHILOSOPHICAL SOCIETY.

FOURTH EDITION.

London:

MACMILLAN AND CO.

1877.

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