Report of Investigations

accidents acid amount antimony approximately barrels barrels of oil base Bismuth blasting bumps Bureau of Mines calculated Carbon cent chalk series charge coal completed compounds contain County crude depth determined distillate drilled effect estimated explosives feet ferrite figures flow fluid formation furnace give given grams gravity heat hole inch increase indicated iron January JUNE JULY lead less Louisiana man-hours in 1933 marl material metal method obtained occurred operated oxide percent pillars pounds practical present pressure production pumping pyrite quarry range reaction reduced reservoir residue roasting rocks sample shales shown shows slag soluble solution Specific sulphate sulphur taken temperature thickness tion treatment United values vapor weight zinc zone Zwolle field