514 



Fourteenth Letter. (3.) On the gra- 

 dual passage of ice into the fluid 

 state, 14. 



Forbes (J. D.) on the Geology of the 

 Eildon Hills, 53. 



Farther remarks on the inter- 

 mitting Brine Springs of £issingen, 

 66. 



Farther experiments and re- 

 marks on the Measurement of 

 Heights by the Boiling Point of 

 Water, 261. 



Observations on the movement 



of Glaciers of Chamouni in winter, 

 285. 



on the Geological relations of 



the Secondary and Primary Hocks 

 of the chain of Mont Blanc, 348. 



Is'otice respecting Father Sec- 



chi's Statical Barometer, and on the 

 origin of the Cathetometer, 480. 



Fordel Coal, vegetable organisms 



found in, 218. 

 Fish in relation to diet, 197. 

 Fishes, urinary secretion of, 452. 

 Franklin (Sir John) Memoir of, 347. 



Garnet, on Crystals and Cavities in, 

 160. 



Gas Thermometer, on the absolute 

 zero of, 160. 



Geographical Astronomy, on the sim- 

 plification of the instruments em- 

 ployed in, 161. 



Geological notes on Banffshire, 332. 



Geometry, a science purely experimen- 

 tal, 341. 



Glacial Phenomena of Scotland and 

 parts of England, 148. 



in Peebles and Selkirk Shires, 



303. 



of Arthur's Seat and Salis- 

 bury Crags, 497. 



Glaciers, observations on, 14. 



of Chamouni, on the movement 



of, iu winter, 283. 



Glenshira, Diatomaceous Sand of, 358. 



Goodsir (Professor John) on the struc- 

 ture and economy of Tethea, and 

 on an undescribed species from the 

 Spitzbergen Seas, 181. 



Notice respecting recent dis- 

 coveries on the Adjustment of the 

 Eye to Distinct Vision, 343. 



on the reproductive economy 



of Moths and Bees ; being an ac- 

 count of the results of Von Siebold's 

 recent researches in Parthenogene- 

 sis, 454. 

 on the mode in which light 



acts on the Ultimate Nervous Struc- 

 tures of the Eye, and on the rela- 

 tionsbetween Simple and Compound 

 Eyes, 487. 



Goodsir (Prof. J., and E. Forbes) on 

 new Marine Animals discovered 

 during a cruise among the Hebrides, 

 27. 



Gregory (Prof.) on a Diatomaceous 

 Deposit in Mull, 58. 



Notice of a specimen of Chlo- 

 ride of Sodium from the great py- 

 ramid of Ghizeh, 71. 



on the species of Fossil Diato- 



mace8e found in the infusorial earth 

 of Mull, 176. 

 Chemical notices on the new 



compounds of Cobalt described by 

 Fremy and others, 193 ; on the Acid 

 formed when Potash acts on Oil of 

 Bitter Almonds, 195; on a sponta- 

 neous Metamorphosis of Alloxan, 

 196. 



Additional observations on the 



Diatomaceous earth of Mull, with a 

 notice of several new species occur- 

 ring in it, and remarks on the value 

 of generic and specific characters in 

 the classification of the Diatomacece, 

 £04. 



on a black Tertiary Deposit, 



containing the Exuviae of Diatoms 

 from Glen Shira, 241. 



Notice of some new forms of 



British Fresh-water Diatomacese, 

 306. 



Observations on the Diatoma- 



ceous Sand of Glen Shira, Part. II., 



containing an account of a number 



of additional undescribed species, 



358. 

 ■ on new species of Marine Dia- 



tomacese from the Forth of Clyde 



and Loch Fine, 442. 

 Gurolite, description and analysis of, 



1. 



Harkness (Prof.) on Annelid Tracks 

 in the Exploration of the Millstone 

 Grits in the south-west of the county 

 of Clare, 294. 



Hayes (D. A. A.) Occurrence of na- 

 tive Iron in Liberia, in Africa, 327. 



Heat, Dynamical theory of, 255. 



Ueat, mechanical action of, 5, 223, 

 287. 



Heat, mechanical theory of, 162. 



Height. Experiments and remarks on 

 the Measurement of Heights by the 

 Boiling Point of Water, 261. 



