Notes for chapter

2. The story is recounted in Krul (2000) pp 67-68

6. Paul (1993a) p 22, with corrections by Van Berkel and Van der Kruit (2000) p 372

9. Quoted in Paul (1993a) pp 26

10. Henrietta seemed to think Kapteyn learned of Gill's work only through Gill's article, but Kapteyn met and corresponded with Gill before Gill's article appeared, and Gill may have appealed rather directly to Kapteyn for help See Krul (2000) p 55

12. In February 1923, the writer of an obituary of Kapteyn, who signed himself only ''J. J.,'' wrote in the Monthly Notices of the Royal Astronomical Society that Kapteyn had help from prison convicts. This story cannot be substantiated. See Krul (2000) p 73

13. In fact, it progressed unevenly until another generation of astronomers wrapped it up in 1970, and the atlas portion was in some ways superseded by later sky surveys that took advantage of advances in photographic technology

16. Quoted in Jones and Boyd (1971) pp 35-36

17. Eddington (1938) p 169

21. Quoted in Jones and Boyd (1971) p 240

22. Quoted in Krul (2000) p 77

24. Kapteyn (1914) p 153

25. Quoted in Paul (1993a) p 79

27. Quoted in Gingerich (2000) p 201

28. Quoted in Paul (1993b) p 210

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