Chapter 1 Abbott Lawrence Rotch, Founder of the Blue Hill Observatory

Chapter 2 Through the Ages

Chapter 3 Conception and Construction of the Observatory

Chapter 4 Initial Detailed Observations: 1885–1886

Chapter 5 Cloud Studies: 1886–1894

Chapter 7 Balloonsondes: 1904–1913

Chapter 8 Directorship under Alexander McAdie: 1913–1931

Chapter 9 Charles Franklin Brooks becomes Director; the Observing Program is Restored and Mount Washington Reoccupied: 1931–1934

Chapter 10 50th Anniversary and the Radio-Meteorograph Program: 1935–41

Chapter 11 The War Years and Rising Costs: 1942–47

Chapter 12 The Observatory and Government Contracts: 1948–1957

Chapter 13 Selection of a New Director and the Interim Directorship: 1957–1958

Chapter 14 Directorship under Richard M. Goody: 1958–1971

Chapter 15 The Observatory and the Metropolitan District Commission: 1971–1985

Chapter 16 The Centennial Anniversary: 1985