IV 



Page 



Transformation of Aniline into Toluidine. By A. W. Hofmann, M.D., 

 LL.D., F.R.S 54 



Colouring-matters derived from Aromatic Azodiamines. By A. W. Hofrnann, 

 LL.D., F.R.S., and A. Geyger, Ph.D. 56 



New Method for producing Amides and Nitriles, By E. A. Letts, Berlin 

 University Laboratory „ 61 



Investigation of the Attraction of a Galvanic Coil on a small Magnetic Mass. 

 By James Stuart, M.A., Fellow of Trinity College, Cambridge 66 



December 12, 1872. 



A Contribution to the Knowledge of Haemoglobin. By E. Ray Lankester, 

 M.A. Oxon., Fellow of Exeter College, and Radcliffe Travelling Fellow 

 of the University. (Plate I.) ' 70 



On the Structural Composition of Urinary Calculi. By H. Vandyke 

 Carter, M.D. Lond 81 



Researches in Spectrum- Analysis in connexion with the Spectrum of the 

 Sun.— No. I. By J. Norman Lockyer, F.R.S. 83 



December 19, 1872. 



Magnetical Observations in the Britannia and Conway Tubular Iron 

 Bridges. By Sir George Biddell Airy, K.C.B., P.R.S., Astronomer Royal 85 



On the Organization of the Fossil Plants of the Coal-measures. — Part IV. 

 Dictyoxylon, Lyyinodendron, and Heterangium. By W. C. Williamson, 

 F.R.S. , Professor of Natural History in Owens College, Manchester .... 86 



Observations on the Temperature of the Arctic Sea in the neighbourhood of 

 Spitzbergen. By John C. Wells, Capt. R.N 91 



List of Presents 98 



No. 141.— January 9, 1873. 



On a new Method of viewing the Chromosphere. By J. Norman Lockyer, 

 F.R.S., and G. M. Seabroke 105 



Further Remarks on the Sense of Sight in Birds. By Robert James Lee, 

 M.A., M.D 107 



On the Union of Ammonia Nitrate with Ammonia. By Edward Divers, 

 M.D 109 



January 16, 1873. 



A new Formula for a Microscope Object-glass. By F. H. Wenham Ill 



Note on an Erroneous Extension of Jacobi's Theorem. Bv Isaac Todhunter, 

 M.A., F.R.S ; ' H9 



