Introduction: The First Century of Science Fiction - essay by Isaac Asimov
The Sandman - novelette by E. T. A. Hoffmann (trans. of Der Sandmann 1816)
The Mortal Immortal - short story by Mary Shelley
A Descent Into the Maelstrom - short story by Edgar Allan Poe (variant of A Descent Into the Maelström)
Rappaccini's Daughter - novelette by Nathaniel Hawthorne
The Clock That Went Backwards - short story by Edward Page Mitchell
Into the Sun - short story by Robert Duncan Milne
A Tale of Negative Gravity - novelette by Frank R. Stockton
The Horla, or Modern Ghosts - novelette by Guy de Maupassant (trans. of Le Horla 1887)
The Shapes - novelette by J. H. Rosny aîné (trans. of Les Xipéhuz)
To Whom This May Come - short story by Edward Bellamy
The Great Keinplatz Experiment - short story by Arthur Conan Doyle
In the Abyss - short story by H. G. Wells
The Thames Valley Catastrophe - short story by Grant Allen
The Lizard - short story by C. J. Cutcliffe Hyne
A Thousand Deaths - short story by Jack London