io THE EVOLUTIONIST AT LARGE. 



verse than this same wee lump of microscopic 

 nerve substance. 



My dog Grip, running about on the path 

 there, with his nose to the ground, and sniffing 

 at every stick and stone he meets on his way, 

 gives us the clue to solve the problem. Grip, 

 as Professor Croom Robertson suggests, 

 seems capable of extracting a separate and 

 distinguishable smell from everything. I 

 have only to shy a stone on the beach among 

 a thousand other stones, and my dog, like a 

 well-bred retriever as he is, selects and brings 

 back to me that individual stone from all the 

 stones around, by exercise of his nose alone. 

 It is plain that Grip's world is not merely a 

 world of sights, but a world of smells as well. 

 He not only smells smells, but he remembers 

 smells, he thinks smells, he even dreams 

 smells, as you may see by his sniffing and 

 growling in his sleep. Now, if I were to cut 

 open Grip's head (which heaven forfend), I 

 should find in it a correspondingly big smell- 

 nerve and smell-centre an olfactory lobe, as 

 the anatomists say. All the accumulated nasal 



