CONTENTS. 



KBUPTIVE HOCKS. 



Page. 



Table I. Complete analyses 589 



II. Silica and alkali deterininatious 590 



III. Lead, ziuc, cobalt, and barium determinations 591 



IV. Gold and silver determinations 594 



LIMESTONES. 



Table V. Comjilete analyses 596 



VI. Lime, magnesia, and chlorine determinations 598 



VII. .Serpentine and amphibole analyses 598 



ORES -VND VEIN MATEKIALS. 



Table VIII Sand carbonates 599 



IX. Cbloro-bromo-iodides 600 



X. Various ores, vein materials, and conutry rocks 602 



XI. Alteration products of porphyry 603 



XII. Alteration products of galena and pyrite 60G 



XIII. Miscellaneous alteration products 607 



XIV. Assays of ores, vein material, and country rocks for silver and gold 608 



587 



