Show oysters and disease in a recent scientific we wc k by profs herdman an I 1 boyce entitled oy oya tera and disease they report the re suit nit of their investigations on the causi pr duces green many epicures prefer their oysters to have the en emerald irald hue though there Is a opinion that green are not edible the investigators arrive at the coi con elusion that there are severd sever d forms of greenm greenn a tf copper la Is taid said to bo be present in minute quantity in all os 08 tore tera it was find that the greenest rree neat nest american ousters contained abo it four times the amount of copper which ie Is present in tho the whitest american oya ten tort careful chemical examination demon conclusively that there Is 1 proportionately more copper in the greener parts of the oysters than in those parts which are ks green a tho green color u of tho the highly prized mar ennes oytra was ans found to be produced by the presence piea pie ence sence of a certain pigment and till not depend upon the amount of the contained copper |