402 



SUMMABY OF THE SCIENTIFIC WOEK OF 

 SIE JOSEPH PEESTWICH, D.C.L, F.E.S., 



BY 



SIR ARCHIBALD GEIKIE, D.C.L., F.R.S., 



DIRECTOR- GENERAL OF THE GEOLOGICAL SURVEYS OF THE UNITED KINGDOM. 



THE scientific career of Joseph Prestwich was marked 

 by the long period over which it extended, and by the 

 wide range of subjects within the domain of geology 

 which it embraced. For more than sixty years, with 

 indefatigable industry, he continued to contribute orig- 

 inal observations and reflections to the science to which 

 he had dedicated his life. His writings cover almost 

 the whole field of geology. He discussed the various 

 agencies, epigene and hypogene, which are now giving 

 rise to geological changes on the earth. He studied 

 the various geological formations from the Old Red 

 Sandstone to the most recent Gravels, but specially de- 

 voted himself to the older Tertiary and the Quaternary 

 series. He gave much thought to the practical appli- 

 cations of geology, and led the way in pointing out the 

 intimate relation between water-supply and geological 

 structure. And lastly, he gave the world the benefit 

 of his ripe experience and long reflection in the text- 

 book in which he took a philosophical survey of the 

 whole realm of geological investigation. 



