414 W. H. MELVILLE — CHEMISTRY OF THE MOUNT DIABLO ROCKS. 



Analysis of a Peculiar Serpentine. 



(164) 



Loss at 100° C 0.39 



Loss above 100° C 20.43 



SiO^ 30.98 



Ci-gOg 0.34 



A],03 1.04 



Fe203 4.88 



FeO- 2.01 



MnO 0.42 



CaO 0.22 



MgO 38.44 



NagO 0.40 



K2O 0.16 



iSOa 0.44 



P2O5 trace 



100.15 



