A definite order obtains among mental phenomena, just as among material phenomena; and there is no more chance, nor any accident, nor uncaused event, in the one series than there is in the other. Moreover, there is a connection of cause and effect between certain material phenomena and certain mental phenomena. Thus, for example, certain sensations are always produced by the influence of particular material bodies on our organs of sense. The prick of a pin gives pain, feathers feel soft, chalk looks white, and so on. The study of mental phenomena, of the order in which they succeed one another, and of the relations of cause and effect which obtain between them and material phenomena, is the province of the science of =Psychology=. All the phenomena of nature are either material or immaterial, physical or mental; and there is no science, except such as consists in the knowledge of one or other of these groups of natural objects, and of the relations which obtain between them. THE END. ------------------------------------------------------------------------ TRANSCRIBER’S NOTES 1. Silently corrected typographical errors and variations in spelling. 2. Retained anachronistic, non-standard, and uncertain spellings as printed. 3. Footnotes have been re-indexed using numbers. 4. Enclosed italics font in _underscores_. 5. Enclosed bold font in =equals=. End of Project Gutenberg's Science Primers, Introductory, by Thomas Huxley