Journal and correspondence. II-VIII. Diary: scientific observations, travel notes, expenses: I(4125). Handwritten copies of articles brought with him during his 1868 expedition to India 1850-1868: 393 pp. II(4126). 1852-1865. 13 notebooks. III(4127). 1867-1871: 12 notebooks. IV(4128). 1873-1879: 16 notebooks. V(4129). 1880-1884: 10 notebooks. VI(4130). 1886-1890: 12 notebooks. VII(4131): 1891-1895: 8 notebooks. VIII(4132). 1896-1907: 9 notebooks. IX-XIII. Correspondence. IX(4133). Letters written on his travels, by Jules Janssen to his wife ně Henriette Forrestier (1859-1901): 359 items. X(4134). Mms Jules Janssen to her husband (256 letters); incoming correspondence A-B (352 letters). XI(4135). C-H (328 letters). XII(4136). Jules Henner (317 letters); H-R (462 letters). XIII (4137). S-Y (87 letters). Janssen's communictions to the Acadm̌ie des sciences (1851-1907), Janssen's bibliography (1907), etc. Papers concern scientific expeditions for the spectroscopic observation of solar eclipses, and transits of Venus; foundation of several observatories (the physical astronomy Observatory in Meudon, France, and at the summits of the Pic-du-Midi, Pyrenněs, and Mont-Blanc, France), and photography. His correspondent include: Babinet, Dȟerais, Desains, Dumas, Edison, Eiffel, lie de Beaumont, Faye, Fizeau, Flammarion, Huggins, Lockyer, Sainte-Claire Deville, Warren de la Rue, etc.