4 THE AMERICAN MUSEUM JOURNAL 



the chemical changes which have been undergone. The mine 

 has been worked for an unknown length of time upon a peculiar 

 deposit of atacamite, a hydrous chloride of copper, which is 

 much prized on account of its easy reduction. The age of the 

 mummy is unknown, but it is supposed to be pre-Columbian. 



THE SERIES OF ETHNOLOGICAL BUSTS. 



I" HE model of the bust, or rather the head and neck, 

 of the young Filipino, illustrated on page 5, is one 

 of an extensive series of typical portrait busts 

 which the Museum has been assembling during the 

 past eight years. The basis of the model is a 

 mold, or mask, of the face taken from a living subject. The 

 Museum now has more than five hundred such molds, together 

 with the additional data necessary for producing the busts. A 

 large number of complete busts has already been prepared. 

 They are in use for study and for exhibition in the Museum 

 and are in constant demand for exchange with other institutions. 

 The greater part of the molds represent typical individuals 

 of the North American tribes : the Indians of the Eastern Wood- 

 lands, the Plains and Pueblo districts, California, the Pacific 

 Coast and the Eskimo of the Arctic regions. Of Asiatic peoples 

 the Aino, Chinese, Japanese and several Siberian tribes are well 

 represented. Molds from the PhiHppine, African and South 

 American native tribes who were at the St. Louis exposition are 

 recent additions to the series. 



It is the purpose of the Department of Ethnology to make a 

 collection in which all the physical types of man shall be repre- 

 sented For many years the value of a collection of skulls from 

 the different races has been appreciated, hvX the experience of 

 investigators is that skulls alone give inadequate data for the 

 study of a race, since differences in the form and size of the 

 skull are not correlated with variations in the size and form of 

 the head. The ideal method of studying the facial characteris- 

 tics of a race is by means of direct measurement of living subjects. 

 Since, however, such subjects are not always available, and an 



