724 INDEX. 



solutions, 151. On the presence of organic matter in the purest waters from terrestrial sources, 

 417. Chemical examination of the tagua-nut, or vegetable ivory, 541. 

 Cyanogen and Paracyanogen, on the isomerism of, 173. 



D 



DA VIES (THOMAS STEPHENS, A.M.). An analytical discussion of Dr Matthew Stewart's general theo- 

 rems, 573. 



DAVY (JOHN, M.D.). On the quarantine classification of substances, with a view to the prevention of 

 plague, 307. On the property belonging to charcoal and plumbago, in fine plates and particles, 

 of transmitting light, 335. On the specific gravity of certain substances commonly considered 

 lighter than water, 387. 



E 



Earthquake Shocks, on the theory and construction of an instrument for measuring, 219. 



Elephant, on the mode in which musket bullets, and other foreign bodies, become inclosed in the ivory 



of the tusks of the, 93. 



Entozoa, account of the natural analogies of the, 561. 

 Eye, observations on the structure of the vitreous humour, and on the vision of objects placed within 



the eye, 377. 

 Eyeball, on certain physiological inferences which may be drawn from the study of the nerves of 



the, 67. 



F 



Fishes Cartilaginous, on the existence of an osseous structure in the vertebral column of, 643. 



FORBES (JAMES D., Esq.). Researches on heat ; fourth series, 1. On the effect of the mechanical 

 texture of screens on the immediate transmission of radiant heat, ibid. Account of some additional 

 experiments on terrestrial magnetism, made in different parts of Europe, in 1837, 27- On the 

 theory and construction of a seismometer, or instrument for measuring earthquake shocks, and 

 other concussions, 219. On the determination of heights by the boiling point of water, 409. 



Fossil Fishes, notice of the, found in the old red sandstone formation of Orkney, particularly of an 

 undescribed species, Diplopterus Agassiz, 89. 



G 



Geological Account of Roxburghshire, 433. 



GOODSIR (HARRY D. S., Esq.). On the development, structure, and economy of the acephalocysts of 

 authors ; with an account of the natural analogies of the entozoa in general, 561. 



GOODSIR (JOHN, Esq.). On the mode in which musket bullets, and other foreign bodies, become in- 

 closed in the ivory of the tusks of the elephant, 93. On the anatomy of amphioxus lanceolatus, 

 247. On the ultimate secreting structure, and on the laws of its function, 295. 



Grilse and Salmon, on the growth of, 343. 



H 



Heat, researches on; fourth series. By James D. Forbes, Esq., 1. On the effect of the mechanical 

 texture of screens on the immediate transmission of radiant heat, ibid. 



Heights, on the determination of, by the boiling point of water, 409. 



Human Society, on the supposed progress of, from savage to civilized life, as connected with the do- 

 mestication of animals, and the cultivation of the cerealia, 177. 



I 



Indian Grass Oil, notice concerning the, 639. 



Italy, De Salariis in supracretaceis Italias stratis repertis, 211. 



