Volume contains letters from the following:
1914 5 April William K Haidinger
1914 3 June Henry E Armstrong
1914 4 June Dukinfield H Scott
1914 5 June Charles Lapworth
1914 5 June Alfred F Yarrow
1914 7 June François A A Lacroix
1914 7 June Gustav Schwalbe
1914 9 June Marie Curie
1914 12 June Frederick Czapek
1914 12 June Charles Lapworth
1914 12 June Max K E L Planck
1914 13 June Pieter Zeeman
1914 14 June Karl Schwarzschild
1914 15 June Jacques Hadamard
1914 16 June Jacques Loeb
1914 17 June Jules Bordet
1914 19 June Gustav Schwalbe
1914 20 June George H Hale
1914 21 June Hendrik A Lorentz (2 letters)
1914 22 June Paul H von Groth
1914 1 July Leonard J Rogers
1914 8 July Edmund B Wilson
1914 16 July William C Gorgas
1914 24 July Leonard J Rogers
1914 28 July Arthur Looss
1914 30 July William C Gorgas
1914 1 August Tannatt W Edgeworth David
1914 [date?] Henri Lebesgue (2 letters)
1955 12 June Jacques Hadamard
1969 24 February Hans A Berthe
1969 6 November Israel H Scheinberg
1969 9 November Michael Polanyi
1969 14 November Hans Balner
1969 14 November Jean L A Brachet
1969 16 November Henri Cartan
1969 27 November Viktor A Ambartsumian
1969 29 November Vojen Lozek
1969 8 December Otto H Heckmann
1969 10 December Jean L A Brachet
1969 12 December George Wald
1969 16 December Paul P Ewald
1971 15 March Henry Harris
1971 22 March Peter B Medawar
1971 25 March Norman E Steenrod.