The Hale Observatory, Mt.
Wilson, California 91023
This paper represents a
progress report on the AAVSO Classical Cepheid Program covering the period JD
2,440,000-JD 2,441,000. It is to be remembered that the primary purpose of this
program is to investigate classical Cepheids with periods greater than 10.0
days for the possibility of slow period changes which might be associated with
evolutionary changes in these stars.