Written by society doctor Henry Holland, this 1852 medical discourse investigates the connections between mental processes and physical health.

Preface; 1. On medical evidence; 2. Effects of mental attention on bodily organs; 3. On mental consciousness, in its relation to time and succession; 4. On time, as an element in mental functions; 5. On sleep; 6. On the relations of dreaming, insanity, etc.; 7. On the memory, as affected by age and disease; 8. On the brain as a double organ; 9. On phrenology; 10. On instincts and habits; 11. On the present state of inquiry into the nervous system.