{HEAD ~ The precipitate} is isolated from {TAIL ~ the fixer solution} to remove silver thereby and hence enable recycling of the fixer solution 
is isolated from
{ HEAD ~ The precipitate } is isolated from { TAIL ~ the fixer solution } to remove silver thereby and hence enable recycling of the fixer solution
HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH