The soul, a study and an argument

according activity adapt afferent nerve aggregation animals APPENDIX assume believe birds blood body brain called cause cerebral hemispheres cerebrum changes chemical chief centre colour conceive connection consciousness cuckoo Darwin decapitated Descartes described designing mind eggs end organs evidence experience fact feeling force functions G. H. Lewes ganglia ganglion hatching Herbert Spencer heredity idea impulse individual intelligence intestinal canal living manifested material maternal instinct mechanism memory mental action molecular monad motion movements muscular natural selection necessary nerve cells nerve centres nervous system nest object operation organic modifications organic structure organised organs of sense Origin of Species periphery phenomena physical laws physicist physiological physiologists present preserved produce profitable variations protoplasm psychical psychical action Psychology purpose recognise recollection reflex action result says scious sensation soul spinal stimulus sub-centres substance supposed term theory thought tion tissue uncon unextended volition whole