THE NONMETALLIC MINERALS. 



Composition of bauxites from various localities Continued. 



231 



No. 1. Contains also 0.4 CaCO 3 . No. 2. 0.2 CaCO 3 . No. 3. 12.7 CaCO 3 . No. 5. 22.90 FeO + Fe,O 3 . 

 No. 60.10 FeO + Fe^A,. No. 7. 0.85 CaO, 0.38 MgO, 0.20 SO 3 . No. 8. 0.35 FeO, 0.41 CaO, 0.11 MgO, 

 0.09 K 2 O, 0.17 NaO, trace CO 2 . No. 9. FeO not det., 0.62 CaO, trace MgO, 0.11 KoO, 0.20 NaaO, 0.26 CO 2 . 

 No. 10. 0.80 CaO, 0.16 MgO. 



Origin and mode of occurrence. The mineral received its name 

 from the village of Baux, in southern France, where a highly ferrifer- 

 ous, pisolitic variety was first found and described by Berthier in 

 1821. The origin of the mineral, both here and elsewhere, has been 

 a matter of considerable discussion. The following notes relative to 

 the foreign occurrences are from a paper by R. L. Packard: 1 



The geological occurrence of the bauxite of Baux was studied by H. Coquand 

 [Bulletin de la Society Geologique de France, XXVIII, 1871, p. 98], who describes 



1 Mineral Resources of the United States, 1891, p. 148. 



