Show TO THE advancement OF ART economic inquiry conducted along scientific lines line means mean much to the human race notwithstanding the growth in recent years yeara ot of the work ork ot of the ge geology oo 00 I 1 gl cal survey surrey along practical economic lines scientific work has haa not been neglected according accor dinc to the annual r report e of the director direct cr for last year in fact in the survey the scientific investigations are inseparable from the economic work though the one or the other may predominate in purpose according to the needs of 0 the particular research in hand la in any field economic work of 0 the highest rank la Is impossible without full knowledge of the scientific laws and principles pertaining to the subject of the work but as there Is no application of geology which does not involve unsolved lims some borne of them of the highest importance the best knowledge available Is nevertheless relative it this follows that the broad and searching observations observe eions which should accompany every dicce of good economic work ork comprehend rom data that are eventually combined in the construction of new scientific hypotheses some of which as more observations accumulate g grow ow into established laws laves or principles pie that are in turn of the greatest practical consequence thus the detailed studies of the deposits in one region or another bring to light evidence from which to determine the genesis of the ores and the modes or conditions by their occurrence and the economic inquiry becomes more intelligent and successful when ulten once this new principle regarding the mode of an ore occurrence is |