240 ESSAYS OF A BIOLOGIST 



ence was mainly materialist. But the common man 

 felt that mind was not the empty epiphenomenon 

 that orthodox science would have it; and he desired 

 a scheme of things in which mind should be more 

 adequately explained than it could be by science at 

 its then stage of development. Hinc illae lacrimae. 



To-day it is at least possible to link up, not only 

 physics and chemistry and geology and evolutionary 

 biology, but also anthropology and psychology, into 

 a whole which, though far from complete, is at least 

 organized and coherent with itself. If the seven- 

 teenth century cleared the ground for that dwelling- 

 place of human mind which we call the scientific 

 view of things, if the eighteenth century laid the 

 foundations and the nineteenth built the walls, the 

 twentieth is already fitting up some of the rooms for 

 actual habitation. 



There are certain other domains of reality which 

 have not yet been properly investigated by science. 

 Telepathy, for instance, and the whole mass of phe- 

 nomena included broadly under the term spirit- 

 ualism, are in about the some position with regard to 

 organized scientific thought to-day as was astronomy 

 before astrology's collapse, as was the study of elec- 

 tricity in the eighteenth century, or that of hypno- 

 tism in the middle of the nineteenth. What is more, 

 the average man demands that phenomena of this 

 order shall be included in his scheme of things. Sci- 

 ence cannot yet do this for him; and accordingly 

 the dwelling-place that we are building must still 



