Waldemar Kaempffert

• Gas-engines and Producer-gas Plants; a Practice Treatise Setting Forth the Principles of Gas-engines and Producer Design, the Selection and ... Engines and Their Possibilities, the Care
• Modern Wonder Workers; a Popular History of American Invention;
• The New Art of Flying
• A popular History of American Invention- 2 Volumes
• Collier's Wonder Book
• Discovering new facts about paper
• Explorations in science
• Famous Fantastic Mysteries #3
• Gas-Engines and Producer-gas Plants; a Practice Treatise Setting Forth the Principles of Gas-engines and Producer Design, the Selection and Installation of an Engine, Conditions of Perfect Operation, Producer-gas Engines and Their Possibilities, the Care
• Our medical army does a vast job
• Science today and tomorrow
• The patient's dilemma