2-+Spencer,+Huxley,+Weber

**Herbert Spencer**
 * Lived from 1820 to 1903
 * English philosopher, biologist, sociologist, and prominent liberal political theorist of the Victorian era
 * Coined the term “survival of the fittest”
 * Published //Principles of Biology// in 1864
 * Sometimes credited for Social Darwinism

**Thomas Henry Huxley**
 * Lived from 1825 to 1895
 * English biologist
 * Known as “Darwin’s Bulldog” for his public support for Darwin’s theory of evolution
 * Coined the term “agnostic,” which describes a person who believes that is known or can be known about anything beyond material phenomenon, in 1869
 * Worked on invertebrates and vertebrates, and concluded that birds evolved from small carnivorous dinosaurs

**Ernst Heinrich Weber**
 * Lived from 1795 to 1878
 * German physician
 * Considered one of the founders of experimental psychology
 * Studied tactile senses, the two-point threshold, and weight perception
 * He found that weight discrimination was much finer with active lifting than when the weights were placed on supported hands. He also found that the [|just-noticeable difference] of the change in the magnitude of a stimulus is proportional to the magnitude of the stimulus rather than being an absolute value
 * Published two books in German: //De Tactu// and //Tastsinn und Gemeingefüh//l
 * He is also noted with the discovery of the rudimentary uterus in male mammals
 * He also studied the sensory organs

Brianna M