Xll , CONTENTS. 



On the Crania of the Kaffirs and Hottentots, and the Physical and 

 Moral Characteristics of these Races. i>j Dr Black, F.GS., . 4oG 



On a Roche Moutonnee on the summit of the range of hills sepa- 

 rating Loch Fine and Loch Awe. In a Letter from the Duke 

 of Argyll to Professor Forbes, . . . . 459 



On M. J. Nickles' claim to be the Discoverer of Fluorine in the 

 Blood. By George Wilson, M.D., F.R.S.E., Regius Professor 

 of Technology in the University of Edinburgh, . . 463 



On the Functions of the Spinal Cord, By Professor Hughes Ben- 

 nett, ....... 470 



On the Delta of the Irrawaddy. By T. Login, C.E., Pegu. Com- 

 municated by William Swan, Esq., . . . .471 



Notice of a Collection of Maps. By A. K. Johnston, Esq., . 477 



Notice respecting Father Secchi's Statical Barometer, and on the 

 Origin of the Cathetometer. By Professor Forbes, . . 480 



History of an Anencephalic Child. By Dr Simpson, . . 482 



On certain Laws observed in the Mutual Action of Sulphuric Acid 

 and Water. By Balfour Stewart, Esq. Communicated by Dr 

 G. Wilson, . . . . . . .482 



On the Structure of Pedicellina. By Professor Allman, . 486 



On a Case of Lateral Refraction in the Island of Teneriffe. By 

 Professor C. Piazzi Smyth, . . . . . 487 



On Insect Vision and Blind Insects. By Andrew Murray, Esq., 487 



On the Mode in which Light acts on the Ultimate Nervous Struc- 

 tures of the Eye, and on the relations between Simple and Com- 

 pound Eyes. By Professor Goodsir, . . .489 



On the recently discovered Glacial Phenomena of Arthur's Seat and 

 Salisbury Crags. By Robert Chambers. Esq , . . 497 



On a Dynamical Top, for exhibiting the Phenomena of the Motion 

 of a System of invariable form about a Fixed Point ; with some 

 suggestions as to the Earth's Motion. By Professor Clerk Max- 

 well, . . . . . . .503 



On the true Signification of certain Reproductive Phenomena in the 

 Polyzoa. By Dr Allman, ..... 504 



On the Destructive Distillation of Animal Matters. Part IV. By 

 Dr Anderson, Glasgow, ..... 505 



Analysis of Specimens of Ancient British, of Red Indian, and of 

 Roman Pottery. By Murray Thomson, . . .505 



Theory of Linear Vibrations. Part VI. Alligated Vibrations. 

 By Edward Sang, Esq., ..... 507 



