Sonic of tlic clienpcr tniinin cstmcts: such RS innngrorc, hnvc two prcnt tlcfects, wz., their d ~e p red colour nntt IiiirJli tnnnage. Tlic licst \v;i>' to oscrconic ttie colour tlillicrilty lies in tlic jndicious misttire of purc, unndiiltcmtcd cstriicls 1vit.h light-colourecl tnnning nintcriiils in tlic tanvarcl. But .cry little scciiis to linrc been done hy thc tniinili cstrnct iiiiinufiwtiirc1x to OWI*COIIIC tlie clclcct of Ilnisli Liiinngc. Tlic liist portion of this pnpcr cnibodics tlic rcsulta of cspcriiiiciits carried out lo overconic this tlcfcct. !Chc sup gestion cniiic froin tlic \*ark carried out iii connection with tlic fnt coiitciit in tan h r k s wliicli forms tlic fiist pnrt of this pnpcr. [l'ltc probable rdc of jell i t & 11111 hrlis. It lii~s been noticcd tlint well-knowii tiiiiuing mittcriuls giving soft tniyiogc conliiin iidiir:ill.y J ~O P C fati tliiiii otlicrs giving l m i d i tnniiiigc, ns IS ylioivii in the following table. Tlic nir-drictl b w b were finely powtlcrccl and cstrncteil with ,l!ot pctrolciiin spirit till tlicv \vcrc frcc froiii fiit. llic following were tIic ivsiiits ObtiiiiiccI :-! : rlltnl ailiril cstr:tLt. 3loistu~e. ! Tiiiiiiiii. petroleiinl S:llllc.