58 Report of the President 



beautiful exhibit, and it is at the same time the most intricate 

 and difficult member of the series planned for the hall. Mr. 

 Latzko has likewise prepared the wooden core for the second 

 member of the series, the Mt. Holyoke Range Region in Mas- 

 sachusetts, and has begun the core for the third member, which 

 will represent the Watkins Glen Region of New York State. 

 The horizontal scale of the Grand Canyon model is 1 : 12000, 

 or one foot to about two and one-fourth miles; that of the 

 other two is 1 : 15000, or nearly one foot to two and three- 

 quarters miles. In all, the vertical scale is double the hori- 

 zontal. A sketch model of the Yosemite Valley is in course 

 of preparation by the Morgan Brothers Company and is to be 

 delivered early in 19 19. 



During the early part of the year, Associate Curator Reeds, 

 with the assistance of Mr. Hill, resumed the intensive study 

 of the seismograph and its records. Interrup- 

 eismograp tJons, d ue to various causes, however, have im- 

 peded the work, and our wireless receiving outfit was removed 

 when the United States entered the war, so that we have not 

 been able to get accurate time with regularity. It is hoped, 

 however, that the apparatus will soon be in proper use again. 



The eight cases containing the general collection of meteor- 

 ites have been removed from the fourth floor hall and installed 



in the north corridor of the ground floor beside 

 Corridor ^he collection of Building Stones. There have 



also been placed in this corridor the collection 

 illustrating the Geology of Manhattan Island and the large 

 single geological specimens formerly in our main exhibition 

 hall. ] 



Miss Dunst, with the occasional assistance of Miss Marks, 

 has prepared a card index of all the accessions to the depart- 

 mental collection listed in the annual reports of 



Catalogue t h e Museum from the beginning, and is still oc- 



Work .".,..., ,.,... , 



cupied with assembling into envelopes corre- 

 spondingly numbered all the available letters and other data 

 pertaining to the acquisition of each lot. Mr. J. B. Thornhill 



