LIST OF ILLUSTRATIONS. 
Plates I. II. — Professor J. Cleek Maxwell on the Theory of Compound Colours. 
Plate III. — Dr. Andeews and Professor Tait on the Volumetric Kelations of Ozone. 
Plate IV. — Sir David Beewstee and Dr. J. H. Gladstone on the Lines of the Solar 
Spectrum. 
Plates V. VI. — Dr. A. Matthiessen on the Electric Conducting Power of Alloys. 
Plates VII. VIII. IX. — Mr. W. Faiebaien and Mr. T. Tate on the Density of Steam at 
different Temperatures. 
Plates X. XI. XII. XIII. XIV. — ^Mr. Peestwich on the Occurrence of Flint Imple- 
ments, associated with the Eemains of Animals of Extinct Species in Beds of a late 
Geological Period, in France at Amiens and Abbeville, and in England at Hoxne. 
Plates XV. XVI. — Mr. Evans on the Deviation of the Compass in the Iron Ships of 
the Eoyal Navy. 
Plates XVII. XVIII. XIX. XX. XXI. XXII.— Dr. Caepentee’s Researches on the 
Foraminifera. 
Plate XXIII. — Mr. Beale on the Distribution of Nerves to the Elementary Fibres of 
Striped Muscle. 
