- George O. Smith
- Manly Wade Wellman
- Marie Curie
- Albert Einstein
- Margaret St. Clair
- Alfred Russel Wallace
- Gertrude Franklin Horn Atherton
- Rosetta Luce Gilchrist
- Balfour Stewart
- Svante Arrhenius
- Damon Knight
- H. A. Overstreet
- Lodowick Muggleton
- Unknown
- Benjamin West Ball
- A. E. H. Tutton
- Charles Nordmann
- William R. Eyster
- Immanuel Kant
- Thornton Wilder
- Wilhelm Bölsche
- George O. Smith
- George O. Smith