56 Report of the President 



GEOLOGY, GEOGRAPHY AND PAST LIFE OF THE 



EARTH* 



Edmund Otis Hovey, Curator 



Noteworthy progress has been made in the reinstallation 



of the exhibition hall. The topo-geological models of the Mt. 



Tom-Mt. Holyoke Range region in Massachu- 



HaU bltl ° n setts, the White Mountain region in New 

 Hampshire, the Standing Stone region in Ten- 

 nessee, and the Watkins Glen region in New York, have 

 been completed and installed and show how attractive this 

 feature of the hall will be. In the first three of these models, 

 the geology of the districts concerned has been indicated with 

 representations of the actual rocks occurring therein. The 

 effect is a pleasing departure from the conventional and star- 

 ing contrasts of the ordinary geological map. The Watkins 

 Glen region has been treated to show glacial geology, and 

 the edge of the retreating ice sheet has been introduced to 

 render the geology itself more intelligible to the lay visitor. 

 Morgan Brothers are installing the model of Porto Rico, the 

 Virgin Islands and the great ocean deeps adjoining. This model 

 is at the south entrance to the hall opposite the Grand Canyon 

 model and forms a striking contrast to It. The Yosemite 

 Valley core was completed early in the year, and much prog- 

 ress has been made on those for the San Francisco Bay and 

 Crater Lake regions. 



Under Dr. Reeds, the work on the historical and biologic 

 series has gone forward, Mr. Foyles having been engaged 

 on the former, and Dr. H. N. Coryell, an expert on fossil 

 bryozoa, having devoted some time to the latter. Mr. Foyles 

 has revised the preliminary arrangement of the geological 

 periods (Ordovician to Pennsylvanian inclusive) as far as 

 cases and catalogued material would permit. 



* Under the Department of Geology and Invertebrate Palaeontology (see also 

 pages 201 and 203). 



