INDEX 11. 



153 



Heart, on the motions and sounds of 



the, 261, 275. 

 Heat, central, theory of, 69. 

 Hodgkiu (Dr.) on the communications 



between the arteries and absorbents, 



289. 

 Hydrogen, sulphuretted, in springs. 



Ichthyology of North America, 202. 

 Ireland, on the remarkable plants of, 

 257. 



Jerrard (G. B.) on the validity of his 

 method of transforming and resolv- 

 ing equations, 295. 



London Committee on the communi- 

 cation between the arteries and ab- 

 sorbents, 289. 



London Sub-committee on the motions 

 and sounds of the heart, 261. 



Lubbock (J. W.) on the discussions of 

 observations of the tides, 285. 



Mackay (J. T.) on the remarkable 

 plants of Dublin, Edinburgh, and 

 south-west of Scotland, 253. 



on the plants wliich characterize 



Scotland and Ireland, 257. 



Magnetic force, terrestrial, its direc- 

 tion and intensity in Scotland, 97. 



Mammab'a of North America, 137. 



Marsupial animals of North America, 

 149. 



Medical science : — on the motions and 

 sounds of the heart, 261 ; on the pa- 

 thology of the brain and nervous 

 system, 283. 



Meteoric water, on, 3. 



Migi-ation of birds, 186. 



Mineral waters, on the state of our 

 knowledge respecting, I. 



Nervous system, pathology of the, 283. 

 Nitrogen in springs, 71. 



•Ornithology, North American, 164. 



Phillips (Prof.) on subterranean tem- 

 perature, 291. 



Powell (Rev. B.) on determining the 

 refractive indices for the standard 

 rays of the solar spectrum, 288. 



Pyrrhine, 1, 2. 



Rain-water, examination of, 2. 



Reptilia of North America, 197. 

 Richardson (Dr.) on North American 

 zoology, 121. 



Sabine (Major Edw.) on the direction 

 and intensity of the terrestrial mag- 

 netic force in Scotland, 97. 



Salt-springs, ingredients of, 16; origin 

 of, 74. ' ' 5 



Scotland, on the direction and inten- 

 sity of the terrestrial magnetic force 

 in, 97; remarkable plants of, 253, 

 257. . » ' 



Sea-water, mineral [substances found 

 in, 4; gaseous contents of, 6. 



Silica, its origin in springs, 25. 



Snow-water, on, 2. 



Soda, carbonate of, in certain'seeon- 

 dary rocks, 24; without carbonic 

 acid in springs, 25. 



Solar spectrum, on determining the re- 

 fractive indices for the standard rays 

 of, 288. ' 



Sound, theory of the velocity of, 233 ; 

 its propagation through liquids, 244. 



Springs, mineral, state of our know- 

 ledge respecting, 1. 



, exerting a peculiar'action'upon 



the animal oeconomy, 44. 



, gases evolved from, 36. 



, influence of earthquakes upon, 



, ingredients of, 11, 14. 



, origin of springs in general, 58. 



, products of, 56. 



, temperature of, 7. 



, salt, origin of, 74. 



, thermal, origin of, 59 ; geologi- 

 cal position of, 62 ; theories of, 67. 



Temperature, subterranean, report of 



experiments on, 291. 

 Thermal waters, state of our knowledge 



respecting, 1 ; catalogue of, 80. 

 Tides, discussions of observations of 



the, 285. 

 Todd (Dr.), report on the motions and 



sounds of the heart, 261. 



Water, mineral and thermal, on the 

 present state of our knowledge re- 

 specting, 1. 



, definition of the term * mineral 



water', 1. 



, atmospheric, 1. 



of lakes, 6. 



of seas, 3. 



