- Series: Dr. Hackensaw's Secrets Series Record # 9698
- Series Tags: invisiblity (1), science fiction (1), electric typewriter (1), dictation printer/translator (1)
- Dr. Hackensaw's Secrets
- 1 The Secret of Artificial Reproduction (1921) [SF] by Clement Fezandié
- 2 The Secret of the Atom (1921) [SF] by Clement Fezandié
- 3 The Secret of Suspended Animation (1921) [SF] by Clement Fezandié
- 4 The Super-Nose (1922) [SF] by Clement Fezandié
- 5 The Secret of Invisibility (1922) [SF] by Clement Fezandié
- 6 The Secret of the Tel-Automaton (1922) [SF] by Clement Fezandié
- 7 The Secret of Life (1922) [SF] by Clement Fezandié
- 8 The Secret of Electrical Transmission (1922) [SF] by Clement Fezandié
- 9 The Secret of Television (1922) [SF] by Clement Fezandié
- 10 The Secret of Tel-Hypnotism (1922) [SF] by Clement Fezandié
- 11 Journey to the Year 2025 (1922) [SF] by Clement Fezandié
- 12 The Secret of the Philosopher's Stone (1923) [SF] by Clement Fezandié
- 13 The Secret of Artificial Gills (1923) [SF] by Clement Fezandié
- 14 The Secret of the Motorless Airplane (1923) [SF] by Clement Fezandié
- 15 The Secret of the Sixth Sense (1923) [SF] by Clement Fezandié
- 16 The Secret of the Earthquake (1923) [SF] by Clement Fezandié
- 17 The Secret of the Walking Radiobile (1923) [SF] by Clement Fezandié
- 18 The Secret of the Talking Ape (1923) [SF] by Clement Fezandié
- 19 The Secret of the Super-Telescope (1923) [SF] by Clement Fezandié
- 20 A Car for the Moon (1923) [SF] by Clement Fezandié
- 21 Dr. Hackensaw's Trip to the Moon (1923) [SF] by Clement Fezandié
- 22 What Hackensaw Found on the Moon (1923) [SF] by Clement Fezandié
- 23 The Secret of the Memory Obliterator (1923) [SF] by Clement Fezandié
- 24 The Secret of the Submarine City (1924) [SF] by Clement Fezandié
- 25 The Secret of Perpetual Youth (1924) [SF] by Clement Fezandié
- 26 The Secret of the Mermaid (1924) [SF] by Clement Fezandié
- 27 The Secret of Size (1924) [SF] by Clement Fezandié
- 28 Around the World in Eighty Hours (1924) [SF] by Clement Fezandié
- 29 The Secret of the Flying Horse (1924) [SF] by Clement Fezandié
- 30 The Secret of the Dream Machine (1924) [SF] by Clement Fezandié
- 31 The Secret of the Gravitation Screen (1924) [SF] by Clement Fezandié
- 32 The Secret of the Microscopic World (1924) [SF] by Clement Fezandié
- 33 The Secret of Perpetual Motion (1924) [SF] by Clement Fezandié
- 34 The Secret of the Extinct Microbe (1924) [SF] by Clement Fezandié
- 35 A Journey to the Year 3000 (1925) [SF] by Clement Fezandié
- 36 The Mystery of the Z-Ray Spectacles (1925) [SF] by Clement Fezandié
- 37 The Mystery of the Walkin Skeleton (1925) [SF] by Clement Fezandié
- 38 The Mystery of the Radio Cipher Machine (1925) [SF] by Clement Fezandié
- 39 The Mystery of Atomic Energy (1925) [SF] by Clement Fezandié
- 40 A Journey to the Center of the Earth (1925) [SF] by Clement Fezandié only appeared as:
- 44 Some Minor Inventions (1926) [SF] by Clement Fezandié
- 45 The Secret of the Invisible Girl (1926) [SF] by Clement Fezandié