Show Magnetite as Ships' Ships Ballast American ships which plow Pacific swells now are through down with magnetite bal bal- ballast ballast ballast weighted rocky iron ore in- in instead in in- instead instead last made from a pig- pig stead of the more customary AccordIng Accord- Accord AccordIng iron ingots and scrap steel of interior the department Ing to originally originally originally chief reason for the change nally was wartime necessity When ships were being built bunt and launched so quickly that there wasn't enough and ingots to go round it was scrap found that magnetite mixed with substitute just about concrete was a as good and in fact even cheaper from Most of the ore is obtained California and Nevada hills |