In I. the oxygen atom protects tlie linknge A ~: ~, but is unable to protcrt A;,.., ; hence this forni is cnpnlile of irbsorbing two ntoiiis of iodine. In 11, the protectetl l'robnblg both fZ2 2%. In the ense of tlic ~inplitliols, to ~vliicli nlliisioii hns nlrendy h e n inntlc, it is clinicillt to uiiderstniid why tho a-form should nbsorh three ntoiiis of iodine n i d libcrntc iodine, ahile the /3-coiii Iountl nbsorbs two ntoiiis nntl lihrntes no iodine. d i e reiictiori product of \'ijs* soliition niid ~-riiiplitliol was isoliitctl. It forms feathery silky ncctllcs riielting nt 8i" C., niid is ensily soluble in iilcoliol. ether. mid alltnliric soliiCio~is ; n deterniinntion of tlie linlogenq gnre iiiiiiibers closclg corresponding to the foriniiln, CloH ( 0 H ) J . S o chlorine coiiltl 110 cletcctcd. It w o u ~ tlicrc!ore ncpcnr t ~i n t tlie iodine c ~o r i d o niitlition prodiict lind been Iiydrolyscd by the water present in \Vijs' soliition with the production of n Iivdrosyi dcrivntive nnd the ~ihrntioii of Iiydrocliloric iicid: Our tlinnlts nrc due to the directors of JIcssrs. Ihrry, Ostlere nnd Shepherd, Ltd., I~iiioleiini Alnniifnctiircrs. Kirkcnldy, for the use of their Inboriitory in \vliich 1110 cspcrinientnl work \rns cnrricd out. , . , . iirid the unprotected A,&.&. Yorkshire Section. 31II. F. IV. IlIlASSOS IS TllE CII.%IB.