PEOCEEDINGS OF 

 THE ROYAL SOCIETY. 



vol. xxxi. No. 207. 



CONTENTS. 



November 18, 1880. 



PA&B 



I. On the Essential Properties and Chemical Character of Beryllium 



(G-lucinum). By L. F. Nilson and Otto Petteesson . . .37 



II. On the Molecular Heat and Volume of the Bare Earths and their 



Sulphates. By L. F. Nilson and Otto Petteesson . . .46 



III. On the Absorption Spectra of Cobalt Salts. By W. J. Kussell, Ph.D., 



F.B.S., Treas. C.S., Lecturer on Chemistry at the Medical School, St. 

 Bartholomew's Hospital .51 



IY. On the Friction of Water against Solid Surfaces of Different Degrees of 

 Boughness. By Professor W. C. Unwix, M.I.C.E., Professor of 

 Hydraulic Engineering at the Koyal Indian Engineering College . 54 



November 25, 1880. 



I. On the Chemical Composition of Aleurone-Grains. By S. H. Vines, 



M.A., D.Sc, Fellow of Christ's College, Cambridge . . . .59 



II. On the Ossification of the Terminal Phalanges of the Digits. By F. A. 



Dixet, B.A. Oxon. (Plates 1, 2) .63 



IIT. On a Sun-Spot observed August 31, 1880. By J. 1ST. Lockyee, F.K.S. . 72 



IV. On Methods of Preparing Selenium and other Substances for Photo- 



phonic Experiments. By Professor G-eaham Bell . . . .72 



For continuation of Contents see 4itk page of Wrapper. 



