394 Field Museum of Natural History — Reports, Vol. V. 



placing of the specimens. Following this collection, two cases of a 

 combined upright and flat form are devoted to the William J. Chalmers 

 crystal collection and two similar cases contain collections illustrating 

 varieties of amber and ornamental objects carved from semi-precious 

 stones. Following these, six large oblong cases, three square cases and 

 two narrow, upright cases contain the meteorite collection. In the square 

 cases are placed large, single specimens of the Davis Mts., Long Island 

 and Brenham falls, respectively, while the remaining meteorites which 

 are exhibited are to be disposed on pyramids or shelves in the other 

 cases. The remainder of the hall is devoted to four upright cases 

 arranged in alcove form containing collections of concretions and 

 septaria, and specimens illustrating glacial phenomena, weathering, etc. 

 Two large, glaciated slabs from Kelley Island and Amherst, Ohio, are 

 to be installed on individual bases in opposite alcoves in connection with 

 this series. In the next hall south there have been placed at the east end 

 eight upright cases. These are to contain the collections illustrating 

 various rock structures, such as dikes, veins, cave formations, rock 

 markings, etc. These cases are arranged in alcove form disposed in a 

 manner similar to that already described for the cases containing the 

 systematic mineral collection. A case devoted to large g^^psum crystals 

 and one containing a fulgurite nine feet in length are also placed in this 

 hall. Following these, eight sloping-top cases are devoted to the collec- 

 tion of systematic petrology. Each specimen in these cases is mounted 

 on an individual block screwed to a pyramidal screen. The installation 

 of this collection is complete, 872 specimens being now on display. The 

 remainder of this hall extending eastward is to be devoted to the exhibi- 

 tion of the map collection, consisting of about seventy-five relief and 

 other maps, also globes and other geographic material. The maps are 

 to be exhibited on tables which are to be arranged in positions similar 

 to those of the cases which form the alcoves in other halls of the depart- 

 ment. The maps have been unpacked and partially placed, but have 

 not yet been finally installed. The following hall south contains collec- 

 tions of an economic character, chiefly of coal, petroleum and other 

 hydrocarbons, and sands, clays and soils. Of these collections, those of 

 the first group will occupy the eastern half of the hall, those of the 

 second group, the western half. The eastern half is installed according 

 to the alcove plan, similar to that adopted in the department as a 

 whole, eighteen upright cases forming nine alcoves. In these alcoves 

 and adjacent to them ten table and other low cases are placed, and 

 in one double-spaced alcove a large case containing an exhibit of coal- 

 tar products. A model of the original Rockefeller oil refinery which, 



