122 



NEPHRITE AND JADEITE. 



two specimens were also submitted to chemical and microscopic study, 

 The following objects were examined: 



1. Bead <>f ligbl color, mottled with emerald green. Blake collection, No. 1-J7. 

 Weigh! i-.-l grammes, specific gravity :>.007. 



2, Head, light green, from Zaachita. Aym<5 collection, Museum numher, 115213. 

 Weight 21.517 grammes, specific gravity 3.190. 



:;. Dark, dull green, trauslucent amulet. Blake collection, No. 79. Weight 

 131,695 grammes, specific gravity '■'>.'■'>'.',->. 



I. Human figure, ligb.1 greenish, finely polished. Blake collection, No. 35. Weight 

 68. 109 grammes, specific gravity 3.152. 



;,. Head and bust, dull opaque green. Blake collection, No. 77. Weight 186.627 

 grammes, specific gravity '■'<.'■'•'■'>-. 



6. Face with bead gear and pendants, light emerald green, grayish back. Blake 

 collection, No. 38. Weighl 30.274 grammes, specific gravity :',.2'.\2. 



?. Head vrith % grotesque mask, dark opaque green, Blake collection, No. 36. 

 Weight 47.432 grammes, specific gravity 3.087. 



B. Serpenl head, translucent, mottled green. Blake collection, No. 37. Weight 

 39.09 grammes, specific gravity 3.337. 



'.'. Ring, pale opaque green, near No. 4. Blake collection, No. 25a. Weight 791 

 grammes, specific gravity 3.199. 



in. Celt-like object, blackish green, from Cholulu. Blake collection, No. r>4<?. 

 Weight 293.91 grammes, specific gravity :?.:!">."). 



II. Rude, squarish head, light green. Scratched by steel. No number nor local- 

 ity. Weight 70.54 grammes, specific gravity 2.758. 



12. Light green jadeite amulet, highly polished, Aynie" collection, No. 105. Weight 

 100,365 grammes, specific gravity 3.337. 



13. Whitish, mottled human figure, dull polish, opaque. From San Martin Mexi- 

 campas. Ayme collection, No. 401. Museum number, 115236. Weight 103.78 

 grammes, specific gravity 3.021. 



The specific gravity of several other Mexican jadeites in the Museum 

 collection was determined several years ago by the late G. W. Hawes. 

 As the data are unpublished they may fairly be inserted here: 



Mas. Xo. 7814. Polished grayish green hatchet. Granular texture, 

 specific gravity 3.34. 



Mas. No. 7845. Polished ornament from Mirador. Grayish, green, 

 less granular, specific gravity 3.34. 



.Mas. No. i'7rS7<4. Three beads. Mottled green and gray, coarsely 

 granular, specific gravities 3.11, 2.94, 2.03. 



Of these objects all but Xo. 11 appear to be jadeite. Xo nephrite 

 could he identified among them. Xos. 1 and 2 were selected for further 

 study, and gave the following analyses: 



