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DAVID ANDERSON-BERRY, M ,D , LL.D., ETC., OH 



search after food and in their method of absorbing it is so remark- 

 able, that one can hardly avoid the conclusion that the acts are 

 those of conscious beings." 



From his remarkable observations on the Arcellce Engelmann 

 writes : "It cannot be denied that these facts point to psychical 

 processes in the protoplasm." Any of you who have worked 

 out the opsonic index in a consumptive patient will agree with 

 me that the actions of the white corpuscles of the blood lead us to 

 the same conclusion. Take also the cells of the body that have 

 specialized. Some will select the nitrogenous waste products 

 in the blood and remove them. Others will select the materials 

 that are needed to make up the fluid that is required for the 

 nutrition of the young of the species. Think also of the newly 

 discovered secretions, hormones, which, secreted by one set of 

 cells, are required for the stimulus that will enable other sets of 

 cells to secrete their substances in right proportions and due 

 quantities. 



The more one studies these cell actions the less one finds the 

 mechanical hypothesis adequate and the more one is led to declare 

 that psychical powers and phenomena are required to explain 

 life and its processes even when these seem most material. 



The functions and powers of the body may be divided into 

 two classes, the vegetative and the organic. The former functions 

 are those of assimilation, reproduction, growth, etc. The governing 

 principle here is adaptation — adaptation to the body's environ- 

 ment and to the various relationships that arise. 



The latter, that is, the organic, are the faculties or instruments 

 (Gr. organon, an implement) by which that environment becomes 

 known ; or, in other words, the mediating powers between the 

 world of matter and the world of mind. The energizing principle 

 here is Motion. 



As my kind friend. Sir David Ferrier, writes : " That the brain 

 is the organ of the mind, and that mental operations are possible 

 only in and through the brain, is now so thoroughly well-estab- 

 lished and recognized, that we may, without further question, 

 start from this as an ultimate fact. But how is it that molecular 

 changes in the brain-cells coincide with modifications of con- 

 sciousness ; how, for instance, the vibrations of light falling on the 

 retina excite the modification of consciousness termed a visual 

 sensation, is a problem that cannot be solved. We may succeed 

 in determining the exact nature of the molecular changes which 

 occur in the brain-cells when a sensation is experienced ; but 



