mixing said {HEAD ~ used fixer solution} with {TAIL ~ an aqueous solution} of hydrosulfide that provides 0.5 to 1.0 moles of hydrosulfide ions per mole of dissolved silver, whereby said dissolved silver is converted to a precipitate of silver sulfide 
mixing said { HEAD ~ used fixer solution } with { TAIL ~ an aqueous solution } of hydrosulfide that provides 0.5 to 1.0 moles of hydrosulfide ions per mole of dissolved silver , whereby said dissolved silver is converted to a precipitate of silver sulfide
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH