Notes: Format is gr. in-8°. The title page has the two titles and two images and between them is "Les mondes connus et inconnus, par Jules Verne". There is a separate title page for each novel. Art credit for Le village aérien has "38 dessins par George Roux", "6 grandes chromotypographies", "Une carte". Also has "Collection Hetzel". The novel starts on page 1 and ends on page 234. It is followed immediately by a one-page table of contents (unnumbered page). Art credit for Les histoires de Jean-Marie Cabidoulin has "Illustrations par George Roux", "6 grandes chromotypographies", "Une carte". Also has "Collection Hetzel". The novel starts on page 1 and ends on page 218. It is followed immediately by a one-page table of contents (unnumbered page). Content based on scanned image at Gallica. Date based on jv.gilead.org.il.