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



wasted in shifting and reshifting installed specimens in order to make 

 room for the installation of new material and keep the collection as 

 available as possible in the cramped quarters they occupy. Space for 

 the organization and preparation of the Elihu Hall herbarium was 

 gained by shifting a ntimber of exhibition cases into a hollow square on 

 the exhibition gallery and connecting the case with the preparator's 

 room. 



In the Department of Geology three halls, Nos. 60, 61, and 62, which 

 had been closed to the public for several years were reinstalled and 

 reopened. In two of these halls are now exhibited numerous large, 

 vertebrate fossils of Pleistocene age, including skeletons of the Cave 

 Bear and large birds of New Zealand, the mastodon skull found at 

 Yorkville, Illinois, and restorations of the giant sloth, large turtle, large 

 armadiUo or Glyptodon, and fossil shark jaws. Various bones of the 

 mammoth and mastodon, small whales and Tertiary titanotheres are 

 also shown in these halls, and a series of the large, corkscrew-like forms 

 known as D^monelix. In addition, a model of the above-ground work- 

 ings of the Shui kao Shan lead mine, Hunan, China, has been installed 

 in Hall 60. This model covers an area of about 170 square feet. It is 

 enclosed in a case thirteen feet square and placed on a base three feet 

 high. The case and base were constructed at the Museum, the model 

 itself was the gift of the Chinese Commission to the Panama-Pacific 

 International Exposition. The model illustrates on a scale of 1:135 

 the plant at the surface of the mine, and the ore dressing works at which 

 the ore is prepared for smelting. The plant was built by European 

 trained men and illustrates the extent and variety of operations carried 

 on in modem mining. A large specimen of the ore obtained at the mine 

 accompanies the exhibit. To the third hall. Hall 62, of the group 

 recently opened, the petroleum collection previously exhibited in 

 Alcove 107 was transferred, with some additions. As now installed, 

 the collection comprises nine wall cases, two pyramidal floor cases and 

 two flat floor cases of specimens. Of these cases, five are devoted to 

 the petroleums produced in different oil fields, one to a quantitative 

 exhibit of the products of one barrel of petroleum, four to various 

 finished products of petroleum, and three to specimens of petroleum- 

 bearing sands and rocks and their characteristic fossils. To the space 

 left vacant in Alcove 107 by the removal of the petroleimi exhibit, five 

 cases containing stone and iron meteorites were moved and fully 

 reinstalled. One of these cases was devoted to Canyon Diablo meteor- 

 ites, of which the collection contains a large ntmaber of specimens vary- 

 ing in weight from 1013 lbs. to a few ounces. The total weight of this 

 meteorite thus exhibited is over 5,000 lbs. In other cases all the larger 



