Oct. 1900. Annual Report of the Director. 445 



were made to the collections illustrative of the modern life of their 

 occupants. While these additional specimens cover nearly every 

 phase of activity, of special interest are the series of rare dolls, masks, 

 prayer-sticks apd pipes. The third McCormick expedition was in 

 charge of Assistant Burt, who spent two months in completing investi- 

 gations begun earlier in the year on the lower Little Colorado River, 

 Arizona. As a result of this expedition a large amount of material 

 was added from graves and house ruins of the prehistoric Hopi, thus 

 extending the collections into a hitherto unexplored region. The 

 fourth McCormick expedition was in charge of Assistant Owen, who 

 left Chicago early in May and is at present in the field, it being 

 expected that he will not return until early in December. The object 

 of this McCormick expedition is to make a careful and extensive 

 exploration of about fifteen Hopi ruins, eight of which have never 

 before been disturbed. It is too early yet to predict the final result of 

 this expedition, but it is confidently expected that over 2,500 objects 

 will be added to the already extensive prehistoric Hopi collections 

 and that our knowledge of the early distribution of the Hopi will be 

 materially increased. As a result of the work done up to the present 

 time over forty boxes of material have been received by the Museum." 

 The Curator of the Department of Geology says: " In continuation 

 of the work of collecting zinc and lead ores for the Paris Exposition, 

 Assistant Curator Nichols spent several weeks in the early part of the 

 year in the Ozark Mountains of Arkansas visiting the principal mines 

 of the region. A representative series of ores was secured, which 

 will revert to the Museum after the exposition. In the spring two 

 months were spent in Paris by the Curator under appointment as 

 Honorary Mineralogist to the Commissioner General of the United 

 States. Opportunity was here afforded to study methods of installa- 

 tion and the mineral products of various countries. The work of 

 collecting fossil dinosaurs was continued during the summer by an 

 expedition made to Colorado by Assistant Curator Riggs and Pre- 

 parator Menke. The locality worked was one hitherto unknown, but 

 the result of the summer's visit proved most satisfactory. One leg 

 bone found, probably a humerus, was six feet ten inches in length, 

 exceeding by several inches any such bone ever found before and 

 giving proof of the existence of an animal of the dinosaur type larger 

 than was ever before described. Several vertebrae, ribs and pelvic 

 bones of the same individual were also found. Remains of some- 

 what smaller dinosaurs were also secured, chiefly vertebras and bones, 

 including one nearly complete fore leg. About seventy negatives of 

 quarry and landscape views were taken. In addition a representa- 



