JOURNAL OF THE CHEMICAL SOCIETY. CONTAINING THE PAPERS READ BEFORE THE SOCIETY AND ABSTRACTS OF CHEMICAL PAPERS PUBLISHED IN OTHER JOURNALS. F. A. ABEL F.R.S. E.E. ARMSTRONG,Ph.D. W. MARCET M.D. F.R.S. N. STORY-MASKELYNE,F.R.S. E. ATKINSON Ph.D. E. J. MILLS,D.Sc. c. L. BLOXAM F.C.S. HUGO M~~LLER Ph.D. F.R.S. H. DEBUS Ph.D. F.R.S. H. M. NOAD Ph.D. F.R.S. G. C. FOSTER,B.A.,F.R.S. W. ODLING M.B. F.R.S. MICHAELFOSTER,M.D. F.R.S. E. FRANKLAND,D.C.L.,F.R.S. . W. H. PERKIN,F.R.S. H. E. ROSCOE,Ph.D. F.R.S. J. H. GILBERT Ph.D. F.R.S. W. J. RUSSELL,Ph.D. F.R.S. J. H. GLADSTONE Ph.D. F.R.S. A. VOELCKER,Ph.D. F.R.S. A. VERNONHARCOURT,M.A. ,F.R.S. A. w. WILLTAMSON Ph.D. E'.R.S. @kitrattar# Ph.D. E. W. PR~VOST, H. E. ARMSTRONG Ph.D. Ph.D.G. T. ATKINSOR. W. RAMSAY ROBINSON. E.C. BABER. JOHN BOLAS. i R. ROUTLEDGE, THOMAS B.Sc. M.D.,D.Sc. MORTYN T. L. BRUNTON J. SALTER. CHILDS,B.A. a. SCHENK, CHRISTOPHER Ph.D. F.R.S. B. J. GROSJEAN. C. SCHORLEMMER SMITH. C. E. GROVES. WATSON H. J. HELM. i THOMAS M.D. STEVENSON EDWARD KINCH. W.A. TILDEN D.Sc. LICHTENSTEIN. WILLIAMVALENTIN. MAURICE MUIR. ROBERT M. M. PATTISON WARINGTON. 1 WATTS D.Sc. C. H. PIESSE. JOHN W. H. PIKE,Ph.D. 1 C. R. A. WRIGHT,D.Sc. NEW SERIES,Vol. XIII. (Entire Series Vol. XXVIII.) LONDON J. VAN VOORST 1 PATERNOSTER ROW. 1875. LONDON HARRISON ARD SONS PRINTERS IN ORDINARY TO HER MAJESTY ST. MARTIN’8 LAKE.