Hyatt ] 62 [April 5, 
aiiiinals were sliowii to liavo origiiialcd from the simple repetitions 
of ulentical elements. 
2. The existence of an especial force whiclt exhibits itself in 
the orowth of organic, beings, which was (tailed growth force, or 
bathmisni. 
3. That development consists in the location of this energy at 
cei'tain parts of the organism. 
4. That this location was accomplished by use or effort, modi- 
fying and being modified by the environment, or the doctrine of 
kinetogenesis. 
5. That the location of this energy at one i)oint causes its 
abstraction from other points, })roducing "complementarjMliminu- 
tion" of force at the latter. 
6. That the location of this energy, so as to produce the pro- 
gressive change called evolution, is due to an influence called 
"grade influence." 
7. That inheritance is a transmission of this form of energy, 
which builds in precise accord with sources from which it is 
derived. 
8. "^riiat this ''grade influence" is an expression of the intelli- 
gence of the animal, which adapts the possessor to the environ- 
ment bj'an intelligent selection. 
It will be seen further on that most of tlie conclusions are very 
similar to the views taken in this paper, but I have not yet been 
able to understand or use the idea of "grade influence," or recog- 
nize the need of this to the explanation of the phenomena of seiial 
gradation. I also separate bathmism from heredity because the 
location of characteristics and the phenomena of inheritance, gen- 
erally from my point of view, appear to exhibit a mode of action 
entirely distinct from growth and therefore requiring the assump- 
tion of a different force from that which sustains and governs 
growth. 
, Dr. C. S. Minot, who has given the first demonstration of the 
fundamental law of growth, has shown^ that the common views 
with regard to the action of this force in organisms are erroneous. 
His plotted curves of the actual additions of bulk, by growth 
during equal intervals of time in guinea pigs show that these 
increments are in a steadily decreasing ratio to the weight of the 
' Senescence and rejuvenalion, Jour, phys., v. 12, p. 97-153, 1891, and Ou certain 
phenomena of growing old, Proc. Amer. assoc. adv. sci., v. 39, p. 271-289, 1890. 
