Heidelberg, Universitätsbibliothek Heidelberg, Heid. Hs. 3695 EC 4,15 Campbell, William Wallace; Wolf, Max [Recp.]: Briefe von William Wallace Campbell an Max Wolf: Brief von William Wallace Campbell an Max Wolf (Mount Hamilton, 15.5.1906)

(UBH)

about Mks.600,000 per annum. Just what effect this
will have upon Observatory resources remains to be seen,
Mrs. Campbell joins in sending best wishes to your

family and yourself

Yours very sincerely

Professor Dr. Max Wolf,
Astrophysikalisches Institut,
Heidelherg-Konigstuhl,
Germany.