858 INDEX. 



Diamond, Pressure Cavities in, 39. 

 Drift Beds in the South of Arran, 523. 



Duncan (J. Matthews), M,D. On the variations of the Fertility and Fecundity of Women, 

 according to age, 475. 



E 



Earth, Secular Cooling of, 157. 

 Egg, on the Freezing of the, 505. 



Everett (Professor Joseph D.), M.A. Investigation of an expression for the Mean Temperature of 

 a Stratum of Soil, in terms of the time of year, 2 1 . 



F 



Fagnanis Theorem, 285. 



Ferguson (Professor Adam), Biographical Sketch of, 599. 



Fertility and Fecundity of Women, according to age, 475. 



Firola, Anatomy of the Genus, 189. 



Forbes (James D.), LL.D., D.C.L. Experimental inquiry into the Laws of the Conduction of Heat 



in bars, and into the Conducting Power of Wrought Iron, 133. 

 Freezing of the Egg of the Common Fowl, 505. 



G 



Glass, Decomposed, Structure and Optical Phenomena of ancient, 193 



H 



Heat, Laws of the Conduction of, in Iron, 133. 

 Heteropoda, Anatomy and Classification of, 1. 

 Hot-Springs in the Pyrenees, Temperature of, 451. 



Iron, conducting Power of Wrought, 133, 

 Isomeric Compounds, on the Theory of, 707. 



J 



Jackson (E. E. Scoresby), M.D. On the Influence of Weather upon Disease and Mortality, 299. 



On the Temperature of Certain Hot-Springs in the Pyrenees, 451. 



K 



Kelland (Professor). On the Limits of our Knowledge respecting the Theory of Parallels, 433. 



On Superposition, 471. 



L 



Lerneopoda Dalmanni, on the Structure of, 77- 

 Light, Polarisation of, by rough and white surfaces, 205. 

 Lithoscope, Description of, 419. 

 Lycurgus, Agrarian Laws of, 425. 



M 



Macdonald (John Denis), R.N., F.R.S., Surgeon of H.M.S. " Icarus." On the Anatomy and 

 Classification of the Heteropoda, 1. 



On the Representative Relationships of the Fixed and Free Tunicata, regarded as two 



Sub-classes of Equivalent Value, with some General Remarks on their Morphology, 171- 



Notes on the Anatomy of the Genus Firola, 189. 



