Introduction : an age of transition
Swimming at the edges of scientific respectability : sea serpents, Charles Lyell, and the professionalization of geology
Franz Gall, Johann Spurzheim, George Combe, and phrenology : a science for everyone
The crisis in faith : William Crookes and spiritualism
Morals and materialism : Alfred Russel Wallace, spiritualism, and the problem of evolution
Thatige skepsis : Thomas Huxley and evolutionary theory
Negotiating the boundaries of science : an ongoing process.