No. 115.] 33 



slabs mainly from quarries in New York State, with others from the 

 Vermont quarries, Maine granites and Ohio sand-stone, with other 

 stone from Massachusetts, Connecticut and Maryland, and repre- 

 sentative specimens of the red and brown sand-stones of Lake 

 Superior. 



In the first story of the Geological Hall, the following changes 

 have been made, viz. : 



1. The "New Orleans" collection of building-stones, slates, 

 marbles, iron ores, etc., has been placed in a new wall case at the 

 head of the stairs entering the room. 



2. The so-called Quebec Group case originally arranged to con- 

 form to the nomenclature of the Canada Geological Survey, has 

 been removed back one section in the west side wall cases, and 

 placed next to the Huronian. The material in it has been sorted 

 and rearranged so that the specimens of lime-stone, slate and 

 quartzite from typical " Taconic " localities (of Emmons) with some 

 others, previously in drawers, and not on exhibition, now form a 

 separate section, between the Hurcnian and Potsdam-Calciferous 

 cases, under the designation of Metam,orphic (Taconic of Emmons). 

 The case as now arranged is a historic one, representing the type 

 specimens of Emmons' Taconic System, so far as these remain in 

 possession of the museum, holding the place in the arrangement 

 originally given to it by the author of the term " Taconic System 

 in Geological nomenclature." * 



In the second story of the museum exhibition rooms a few minerals 

 have been added to the general collection, but the arrangement has 

 not been altered or disturbed. The collection ot typical rocks for 

 students use has been on exhibition most of the year in a case 

 constructed for it. 



There have been two new table cases put in this room to accom- 

 modate archaeological material not before on exhibition. These 

 cases now stand against the enclosure containing the casts of Mega- 

 therium and Dinotherin remains. 



In the tertiary collections slight changes in the arrangement of 

 the cases have been made, a more natural sequence in the order of 

 their position. 



Three additional table cases have been placed in this room for 

 the arrangement of specimens illustrative of dynamic geology. 



[Assembly, No. 115.] 3 



