EducT 219113.470 Ernest R. Wie gand. 362-St. Nicholas Ave. New York City. NY.

Ditterential Calc.

S = {{ at ~ S+AS: {a (++A+)* = {~ (t2 12 #A++ 4 +3)

S

aat +ator + La At
Sat

AS

CH

At

Harvard College
Library

ARVARDIANS

ET

VERI

TAS

ECCLES

By Exchange