CONTENTS 
OF VOL. 147. 
I. On the Evidence of the existence of the Decennial Inequality in the Solar-diurnal 
Magnetic Variations, and its non-existence in the Ininar-diurnal Variation, of the 
Declination at Hobarton. By Major-General Edwaed Sabine, of the Boyal 
Artillery, Treas. and V.P. of the Boyal Society page 1 
II. On the Stability of Loose Earth. By W. J. Macquoen Eankine, F.R.S. ... 9 
III. On the Geometrical Isomorphism of Crystals. By Heney James Beooke, F.B.S., 
Hon. M.C.P.S. 29 
IV. On the Equation of Laplace’s Functions, &c. By W. F. Donkin, M.A., F.B.S., 
F.B.A.S., Savilian Professor of Astronomy in the University of Oxford . . 43 
V. Researches on Organo-onetallic Bodies . — Third Memoir. On a New Series of Organic 
Acids containing Nitrogen. By E. Feankland, Ph.D., F.R.S. , Professor of Che- 
mistry in Oivens College, Manchester 59 
VI. An account of the Two Methods of Reproductmi in Daphnia, and of the Structure 
of the Ephippium. By John Lubbock, Esq., F.G.S. Communicated by Chaeles 
Daetyin, F.R.S 79 
VII. On the Scelidotheee (Scelidotherium leptocephalum, Owen). By Professor 
F.R.S. &c lOI 
VIII. On the Structure and Development of the Cysticercus cellulosge, as found in the 
Muscles of the Pig. By Geoege Eainet, M.R.C.S., Lecturer on Anatomy and 
Demonstrator of Practical and Microscopical Anatomy at St. Thomas’s Hospital. 
Communicated by E. D. Thomson, M.D., F.R.S. Ill 
IX. Electro-Physiological Researches. Physical and Chemical Phenomena of Muscular 
Contraction. — Tenth Series. Part I. By Caelo Matteucci, Professor in the Uni- 
versity of Pisa. Communicated by Michael Faeaday, Esq., D.C.L., F.R.S. &c. 129 
X. The Bakeeian Lectuee. — Experimental Relations of Gold {and other Metals) to 
Light. By Michael Faeaday, Esq., D.C.L., F.R.S., Fullerian Prof. Chem. Royal 
Institution, Foreign Associate of the Acad. Sciences, Paris, Ord. Boruss. pour le 
