SUMMARY. 63 



sider, involving, as it does, many subjects, and many 

 forces. Still, the detailed consideration of each of 

 the examples given shows the possibility of under- 

 standing what is expressed by the movements in 

 each case. 



A bee visiting flowers expresses certain relations 

 between these subjects. The bee is acknowledged 

 to be impressionable, to be guided to the flower by 

 the sight of the flower, i.e. by the light reflected 

 from the flower. The light reflected from the flower, 

 acting upon the impressionable bee, directs its flight 

 and movements. Is the flower impressionable ? Is 

 the flower affected or impressed by the insect at its 

 visit ? It is certain that variations in plants, and 

 in their flowers in particular, do occur, fitting them 

 to the visits of particular insects. Are these adapta- 

 tions solely due to spontaneous variations preserved 

 as being the fittest ? Is not the modification of the 

 flower helped on by each visit of the insect, to 

 which it ultimately becomes so well adapted ? 



In conclusion, let me quote from a speech by Sir 

 William Gull * : " A tone of the voice, the play of 

 the features, the outline and carriage of the body, 

 are to him (i.e. the physician) as invariably related 

 to the central conditions which they reveal, as are 

 the grosser facts of Nature." 



Summary. Movements in a child may express 

 that it can see and hear. Movement as a mode of 

 expression is particularly worthy of study. It is 

 capable of measurement in time and quantity, and can 

 be recorded by the graphic method ; the records can 

 * Inaugural address, International Medical Congress, 1881. 



