3 88 SCIENCE FROM AN EASY CHAIR 



" eoliths," are (as I think many of them are) the work 

 of man, and whether the high-lying gravels in which 

 they are found are to be regarded as of the oldest 

 Pleistocene Age or as late Pliocene. It is an exciting 



and deeply interest- 

 ing field of practical 

 exploration and 

 reasoned inference. 



It will have been 

 gathered from what 

 I have said that, in 

 seeking for know- 

 ledge of the sequence 

 of events in the period 

 of Palaeolithic Man, 

 everything depends 

 upon extreme care in 

 removing the deposits 

 from a cave inch by 

 inch, and keeping all 

 objects found distinct 

 from one another and 

 assigned to their 

 proper layer. The 

 same system is now 

 applied with great 

 success to the ex- 



FlG. 74. A rough type of flint implement ploration of ancient 

 from the Lower Pleistocene of the Somme -n- . i 



Valley (St. Acheuil). One-half the size of Cltl6S m E ^? t and 

 the object. Central Asia. 



As to the actual 



bones and skulls of men discovered in these Pleistocene 

 deposits, they show us that the Reindeer Men were a 

 fine, full-brained people, as we should expect, with as 

 large a brain cavity on the average as that of modern 



