Show japanese pearl oyster farm japan has a pearl oyster farm in the day bay f ago there has been established a plantation from which a rich harvest Is obtained in may or june stones weighing from six to eight pounds are sunk in shallow water and in august the tiny shells begin to appear on them the stones remain in for two months montha buts but since the young oysters cannot endure cold in november all rocks in less lesa than five feet of water are moved farther out where the temperature JS la more even at the end of three years when the shells are about two inches across they are taken from we trie water nuclei for pearls inserted in them and replaced in the water 30 of them to every six square feet of bottom there th they eyare are left for fo four u r years 1 then being seven and a half years old they ato are removed and searched for pearls |