HEREDITY 185 



physics and chemistry, by narrowing the field of 

 observation and increasing the registering power of 

 the senses, have enlarged the intelligence ; and if, 

 whilst man was ignorant of these resources, his 

 intelligence could be considered sadly limited, now 

 that his new means of investigation have no precise 

 limits, but continue to increase from day to day, we 

 may affirm that the intelligence of man, his psychic 

 cells, as Ramon y Cajal calls them, will continue 

 every day and in the same measure to increase and 

 register with the greatest precision his relation 

 with the external ; in the same way errors will be 

 rectified, and in this indefinite progress we see 

 neither the goal of intelligence nor the limit of 

 Nature, and the parallelism or agreement of the 

 internal with the external will last for an indefinite 

 time, and with ever-increasing accuracy. 



By all these methods human consciousness will 

 continue to perceive and reflect all the rhythms of 

 universal mechanics, while Nature reproduces her 

 organisation, as the sands produce the undulations 

 of the air as it glides over the water, as the clear 

 or stormy sky is reflected on the surface of the sea. 



In the time of Linnaeus it was thought that the 

 conception of species, animal or vegetable, was 

 somewhat invariable and absolute. Linnaeus said : 

 " There exists a number of species equal to those 

 that the infinite Being originally created." 



