built up, each more crass form giving place to one more mobile, till it has become the fitting foundation of the supernatural, the one borrowing its significance from the other, as the pedestal and the statue, or the light and the eye.

The external development of automatic action by nervous stimuli is the typical fact of the simply animal kingdom. The nervous system, from the most rudimentary form, is broadened, varied and compacted in service, till we have reached a vast variety of combinations wonderfully complicated, precise and harmonious in their structure. The palpable and obscure actions that go on in the human body, concurrent in the admirable result by virtue of correlated nervous stimuli, are quite beyond analysis.

It is the primary purpose of the nervous system to receive stimuli of a great variety of orders, and to convert them into muscular movement, diffused and harmonized under the passing and permanent exigencies of the living body. All other offices are grafted on this office. When these stimuli and these actions --- accompanied as they are every instant by a retinue of chemical, thermal, capillary and more obscure physical forces --- pertain to the interior economy of the body, they constitute organic life when they pertain to surface-senses and interior impressions, calling out action toward the environment in its conditions of well-being, they constitute instinctive life. While the interior organic economy of the living animal is automatic under appropriate stimuli, so also is a large share of its movements in the adjustment of itself or of the group to which it