CARNEGIE INSTITUTION OF WASHINGTON
MOUNT WILSON OBSERVATORY
PASADENA, CALIFORNIA
August 12, 1931
UBH
Professor Dr. Max Wolf
Astrophysical Observatory
Konigstuhl-Heidelberg
Germany
Dear Professor Wolf:
I am greatly indebted to
you for your kindness in sending me a set
of your star charts. In the past we have
found these charts most useful and you
have done a fine service in making them
available.
With best wishes for your
good health and again many thanks, I am
Sincerely yours,
FhS:B