David M. Speaker

Titles:

Essays

• Unknown. Letter (Amazing Stories, June 1928)
• Unknown. Letter (Scientifiction, Interpreter of Science)

Reviews

• Unknown. The Disintegrating Ray
• Unknown. The Message from Space
• Unknown. The Supermen

Short Fiction

• Unknown. The Disintegrating Ray
• Unknown. The Message from Space
• Unknown. The Supermen

Genres/Themes:

• element transmutation (1 book)
• interstellar communication reciever (1 book)
• atomic rays (1 book)
• machine men (1 book)
• force screen (1 book)
• disintegrator rays (1 book)
• gene transplants (1 book)