A fective Tendencies 375 
monic property of all living substance which has re- 
cently been especially emphasized by Hering, Semon 
and Francis Darwin, and also to explain the most essen- 
tial and significant biological phenomena proceeding 
from it either directly or indirectly.!® 
By this extension of the mnemonic faculty to all 
elementary physiological phenomena we now obtain a 
somatic or visceral theory of the fundamental affective 
tendencies in the sense that the tendency toward physio- 
logical invariability or toward the restoration of this or 
that previous physiological state corresponding to this 
or that previous environment, depends on innumerable 
elementary specific accumulations, differing from point 
to point of the body and whose combined potential 
energy would form as it were a “force of gravitation” 
toward that environment or those conditions which make 
possible the preservation or restoration of the combined 
physiological system represented by all these elementary 
accumulations. 
Naturally in organisms supplied with nervous sys- 
tems there would arise and be gradually developed side 
by side, in cooperation with, and often as a substitute 
for, every one of these affective tendencies of purely 
somatic origin and seat, the affective tendency repre- 
sented by the corresponding mnemonic accumulations 
which had been deposited in that particular zone of the 
nervous system directly connected with the respective 
points of the body. In man, for instance, this zone 
15See above the chapter on “The Phenomena of Memory and 
the Vital Phenomena.” See also “Die Zentroepigenese und die 
nervose Natur der Lebenserscheinung,” Zeitschr. f. d. Ausbau d. 
Entwicklungs-lehre, 11, 1909, Heft 8-o—“Das biologische Gedachtnis 
in der Energetik,” Annalen der Naturphilosophie, VIII, and Scientia, 
NI, 3, 1900. 
