140 Field Museum of Natural History — Anth., Vol. X. 



These two objects are illustrated on Plate XV, Figs. 4-5. The 

 material of both is called jade by the Chinese, though, judging from 



Fig. 62. 

 Tube, tsu Is'ung, White Jade with Green and Red Spots. 



Fig. 63. 



Tube, tsu ts'ung, of Drab-Colored 



Jade with a Zone of Clayish 



Matter. 



%fr 



^his is also the judgment of Dr. O. C, 

 of Geology, Field Museum. 



their appearance, it rather seems 

 to be a species of marble. 1 The 

 one (Fig. 4) has a lustrous white 

 color and is smoothly polished; 

 it is full of earth incrustations 

 and corrosions which have par- 

 tially altered the surface into a 

 yellow brown. From the point 

 of the upper kue.i to that of the 

 lower kuei it measures 19 cm in 

 length; the diameter of the cir- 

 cular portion varies from 10.5 to 

 12 cm; it is therefore not a per- 

 fect circle, being larger in width 

 than in length. The central per- 

 foration, however, forms a perfect 

 circle with a diameter of 2.5 cm, 

 the hole having been drilled from 

 both sides. The thickness aver- 

 ages 2 cm, but in the lower kuei 



Farrington, Curator of the Department 



