REPORT ON THE DEPARTMENT OF GEOLOGY. 85 



Mr. Schuchert reports the final installation during the year of 

 3,278 specimens, hi all the divisions there have been prepared and 

 senl to the printer manuscript for 5,626 specimen labels. 



The cases in the west-south range containing the volcanic, geyser 

 and hot spring, and rock-weathering series, have been repainted, and 

 the exhibit rearranged. About two-thirds of the building-stone col 

 lection in the southwest court has been thoroughly overhauled and 

 cleansed from the dust and dirt that accumulated during the work of 

 the erection of the balconies. The work of labeling the non-metallic 

 series on the balcony of the southwest court has been practically 



completed. 



A large amount of work has been done in the way of cutting, 

 polishing, and otherwise preparing material for exhibition, particularly 

 in the divisions of geology. A 75-pound mass which was cut from 

 the prehistoric Casa Grande meteoric iron has been sawn into slices 

 and cubes, giving thus valuable material for etching, for exhibition, 

 and for exchange. 



Bui little progress has been made in the way of increasing the exhibi- 

 tion series in the section of vertebrate fossils, owing to the employ- 

 ment of the preparators on work for the Pan-American Exposition, to 

 be noted later. A large Plesiosaur skeleton has, however, been placed 

 on exhibition in a special case, as has also a large and tine skull of 

 friceratops, both of which were received from the Marsh collection. 



Dr. Peale, when not occupied with the routine work of hi- division, 

 has been engaged in the preliminary compilation of a geological sec- 

 tion across the United States from the Pacific Ocean to the Atlantic 

 coast. The line upon which this section was made was drawn through 

 those parts of the country where the most geological data were avail- 

 able. The horizontal scale is 2 miles to the inch, as this coincides 

 with a large part of the topographic data available from the records of 

 the United States Geological Survey. The vertical scale of 4,000 feet 

 to the inch was adopted so that the relief might be apparent . especially 

 ' in those parts of the section where the elevation above sea level is not 

 very o-reat. In order, also, to show the structure of these portion-. 

 the section was carried to a line 5,000 feet below sea level. The work 

 of the Geological Survey in California and in the Appalachian region; 

 that of the survey <»f the fortieth parallel in Nevada. Utah, and Wyo- 

 ming; of the Hayden survey of Colorado, and that of the Kansas, 

 Missouri. Illinois." Kentucky, and North Carolina State surveys, where 

 the line crosses those States, have been utilized in makingthis section. 

 The section has been drawn in water color on roifgb manila paper. 



Mr. Newhall, a- in years past, ha- been engaged in the general work 

 of the details of the exhibition and study series of the division of 

 sreoloary. 



