A dispenser is disclosed which releases a substance such as {HEAD ~ chlorine} into {TAIL ~ an aqueous solution} such as the water of a swimming pool 
A dispenser is disclosed which releases a substance such as { HEAD ~ chlorine } into { TAIL ~ an aqueous solution } such as the water of a swimming pool
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH