[SPECIAL TO THE TIMES]CROWN VOIN*, June 16—“Go get ’em.”These words in brief sum up the instructions of Judge Martin Smith to the Lake county grand jury thismorning.He referred to -vices in whatever form they may come to the attention of the six members of the jury.Probably no grand jury in recent years has received the sweeping instructions which Judge Smith delivered in his deliberate and forceful manner this morning in the Criminal court room. Jurors were urged to take whatever evidence is placed 'before them regarding flagrant violations of the law. They were ordered to delve into any matters of which they may have personal knowledge.Furthermore they are to allow no obstacle to halt their investigation. He explained the unlimited power at their disposal and urged them to use it to the utmost. Any attempts made by witnesses or others to balk the in* quir yare to be brought to the attention of the judge at once.Gambling, slot machines, moon-shining, prostitution, bootlegging— all are to be given attention.The court called attention to theanti-vice crusade which The Timeshas been waging and informed the ;urors that evidence collected by reporters w'ould be at their disposal. Times reporters were in Crown Point this morning ready to appear before the grand jury should they be called.Only one change was made in the personnel of the jury as first drawn. Harry L. Arnold, well known Gary business man, was excused from service and Don Van Lieuw, another Gary man, was substituted.The jury is now composed of thefollowing members:W, E. Bruce of Lowell.John W. Turner of Crown Point. David Frank of Hobart.John A. Anderson of Gary. lt;George Knoerzer of Hammond.Don Van I.ieuw of Gary.The instructions of Judge M. J.Smith of the Grand jury of the Criminal court at Crown Point, in effectwere:Gentlemen of the Grand Jury, the