Till. OBI< J> ANTInl m OF MAN 51 



was found iiiiln-|.|i.,| \ fet Mow the? gurfa< 



umlisturbed beds of sand or gravel, .-m. I - -,:,rjMs t.-ll us 

 the age of the sand bed, the age of tin- n m.tin nm-t lie at 



1-. ... * : .1 fc I 



Klc.t Kh 



infant. thrt>e u ^ it* 



unite*. The at tit 

 lib*, ftt-t, and tur* i trikingly 



least as old as the sand bed. 1>b Geologists are able to esti- 

 mate with approximate accuracy the age of certain de- 

 posits of sand or gravel by determining the rate at \vhk-h 

 similar beds are being foi in .1 nt the present day through 

 the agency of rivers or glaciers. In this way we may be 

 certain of the age of these remains within a iu>i:li^ible 

 error. It is to be remembered that geologists measure 



"'The bones of associated fauna are alao an eridenee of antiq 



