644 



John Peter Boileau, Bart. ; Arthur Cayley, Esq. ; William Fairbairn, 

 LL.D.; Hugh Falconer, M.D.; William Farr, M.D., D.C.L.; 

 Thomas Graham, Esq., M.A., D.C.L. ; Sir H. Holland, Bart., M.D., 

 D.C.L.; Thomas Henry Huxley, Esq.; Sir J. G. Shaw Lefevre, M.A., 

 D.C.L. ; James Paget, Esq. ; Joseph Prestwich, Esq. ; William Spottis- 

 woode, Esq., M.A.; JohnTyndall, Ph.D.; Alex. William Williamson, 

 Ph.D. ; Col. Philip Yorke. 



The following communications were read : 



I. "On Boric Ethide." By EDWARD FRANKLAND, Ph.D., 



F.R.S., and B. DUPFA, Esq. (See p. 568.) 



II. " On Cyanide of Ethylene and Succinic Acid." Preliminary 



Notice, By MAXWELL SIMPSON, Ph.D. (See p. 574.) 



III. "Results of Researches on the Electric Function of the 

 Torpedo." By Professor CARLO MATTEUCCI of Pisa. In 

 a Letter to Dr. SHARPEY, Sec. R.S. (See p. 576.) 



IV. "Natural History of the Purple of the Ancients." By 

 M. LACAZE DUTHIERS, Professor of Zoology in the Faculty 

 of Sciences of Lille. (See p. 579.) 



V. " Contributions towards the History of Azobenzol and Ben- 



zidine." By P. W. HOFMANN, Ph.D. (See p. 585.) 



VI. " On Bromphenylamine and Chlorphenylamine." By E. 

 T. MILLS, Esq. (See p. 589.) 



VII. "New Compounds produced by the substitution of Ni- 

 trogen for Hydrogen." By P. GRIESS, Esq. (See p. 591.) 



VIII. " Contributions towards the History of the Monamines." 

 No. III. Compound Ammonias by Inverse Substitution. 

 By A. W. HOFMANN, LL.D., F.R.S. &c. (See p. 594.) 



IX. " Notes of Researches on the Poly- Ammonias/' No. IX. 

 Remarks on anomalous Vapour-densities. By A. W. HOF- 

 MANN, LL.D., F.R.S. &c. (See p. 596.) 



X. "Notes of Researches on the Poly-Ammonias." No. X. 



