PEOCEEDINGS OE 

 THE ROYAL SOCIETY. 



VOL. XV. ' No. 85. 



. — - 



: J 



.-<rsV CONTENTS. 

 ^^■.^•.;i-Tu> PAGE 



IV. On the Stability of Domes. By E. Wyndham Tabn, M.A 183 



June 7, 1866. 



I. On the Anatomy of the Fovea centralis of the Human Retina. By J. W. 

 Hflke, F.R.C.S., Assistant Surgeon to the Middlesex and Royal London 



Ophthalmic Hospitals 189 



II. Second Memoir " On Plane Stigmatics." By Alexaitder J. Ellis, F.R.S., 



F.C.P.S 192 



III. Fundamental Views regarding Mechanics. By Professor JuurrsPLijcKEB, 



of Bonn, For. Mem. R.S 204 



IV. Contributions to Terrestrial Magnetism. — l^o. X. By Lieut.-General Ed- 



WAED Sabine, R. A., President of the Royal Society 209 



June 21, 1866. 



I. On the Relation of Rosaniline to Rosohc Acid. By H. Caeo, and J. Alt-bed 



WANKLnf, Professor of Chemistry at the London Institution .... 210 

 II. On the Chemical and Mineralogical Composition of the Dhurmsalla Meteoric 

 Stone. By the Rev. Saxiuel Hattghton, M.D., F.R.S., Fellow of Trinity 

 CoUege,DubHn 214 



III. On the Preparation of Ethylamine. By J. Alfeed Wankltn and Eenest 



T. Chapman 218 



IV. On the Expansion by Heat of Metals and AUoys. By A. Matthiessen, 



F.R.S 220 



V. On the Colouring and Extractive Matters of the Urine. — Part II. By Ed- 



ward SCHrNCK, F.R.S. {See. antea, p. 1.) 



The following Communications, read on the 21st of June, will appear in 'No. 86, to 

 be published on the first Thursday of August. 



On the Absorption and Dialytic Separation of Gases by Colloid Septa. — 

 Part I. Action of a Septum of Caoutchouc. — Part II. Action of Metallic 

 Septa at a Red Heat. By Thomas Graham, F.R.S., Master of the Mint. 



Resvilts of the Magnetic Observations at the Kew Observatoiy. — No. III. 

 Lunar Diurnal Variation of the three Magnetic Elements. By Lieut.- 

 General Edwaed Sabine, i*.R.S. 



Variations in Human Myology observed during the Winter Session of 1865-66 

 at King's College, London. By J. Wood, Esq. 



On the Rearing of Tcenia echinococctis in the Dog, from Hydatids, with some 

 Observations on the Anatomy of the adult Worm. By Edwaed Nettle- 

 ship, Esq. 



On the Muscular Arrangements of the Bladder, and the manner in which the 



Ureters and Urethra are closed. By J. B. PETTiGBEWj M.D. 

 Observations on the Ovum of Osseous Fishes. By W. H. Ransom, M.D. 



ERRATA. 



Page 169, fifth line from bottom, after dynamical theory insert comma. 



— 169, fourth line from bottom, after specific heats omit comma. 



— 171, sixth line from top, omit specific gravity is '0069 



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