70 HAYDEN: GEOLOGY OF THE PROVINCES OF TSANG AND 0. 
The sample gave the following results on analysis : — 
Cerium and allied oxides . . CeaOg o'ogS per cent. 
Thorium diox de . . . ThOj 0*054 » .> 
Uranoso-uranic oxide . . . UgOg O'0o6 „ „ 
Pnosphoric oxide . . . P2O5 o 043 „ „ 
These results indicate that the sample contains about 0-15 per cent, of 
tnonazite, and a trace of a th r um uranium mineral in addition. It is, however, 
impossible to express any definite opinion regarding the nature of the latter 
ccnsiituent, unless larger quantities can be procured for examination. 
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