CK-12 Foundation
Ck 12: Analysis: The Number E
[Free Registration/Login may be required to access all resource tools.] This lesson introduces the natural number, e, and how to use it.
University of St. Andrews (UK)
University of St. Andrews: Johann Heinrich Lambert
This page, which is provided by the University of St Andrews, offers a short biography on Johann Heinrich Lambert, a French-German mathematician (1728-1777.) It discusses his life and his contributions to mathematics.