404 INDEX. 



Sounds, mysterious, notice of, 889 



Spain, on the geology of, by Hausmann, 267 



Spittal, Mr Robert, experiments on Mimosa pudica, GO 



Springs, fresh water, at the bottom of tlie sea, account of, 140 



their chemical constitution and temperature, 26 



of inflammable gas in China, 108 



Tabemsemontana, a species of, described, which yields milk, 318 



Temperature, on the mean, of the atmosphere and earth, 233 



Thibet, notice of Dr Gerard's Travels in, 191 



Thompson, Sir Benjamin (Count Rumford), biographical account of, 209 



Tripang, or sea-slug of India, account of the, 46 



Trout, queries respecting the natural history of, 359 



Tytler, P. Esq., on the ancient forests of Scotland, 1 03 



Wauchope, Captain, description of an apparatus, or signal-post, for re- 

 gulating chronometers, 289 

 Wernerian Natural History Society, proceedings of the, 189, 384 

 Wheat, observations on the growth of, 154 

 Whitefield, Mr C. T., on the manis pentadactyla, 58 

 Wilson, James, Esq., on domestication of insects, 368 



Zinkenite, a new mineral, described, 148 



EXPLANATION OF PLATES. 

 Plate I.— Holothuria tubulosa or Tripang, 46. 



Fig. 1. The Tripang or Holothuria laid open. The transparent ob- 

 long bodies are represented at a. The lighter parts of the 

 intestine are those containing fluid. The lung is seen at J. 



Fig. 2. Is the sac, after the removal of the organs ; shewing the 

 calcareous ring of the mouth, the transverse fibres and lon- 

 gitudinal bands, and the membrane, extended across the pos- 

 terior extremity, which forms (and has been termed) the 

 cloaca. 



Fig. 3. Is a view of the groups of vessels which, issuing from the 

 lung, form one vessel, which divides immediately into many 

 small branches, to be distributed to the contiguous intestine. 

 On the outer surface of the intestine is seen a vessel, which 

 may be traced to the anus, where it joins the pulmonary vein. 



Fig. 4. A tentaculum *. 



Plate II — Geognostic Map of the Territorj' of Rome, p. 76. 



Ill — Hart's economical apparatus for heating apartments, p. 172. 

 IV. — Chart of Professor Kupfer's Isogeothermal lines, 

 v.— -Illustrative of Captain Wauchope's Signal-post for regulating 

 Chronometers, p. 289. 

 VI — Nepenthes distillatoria or Pitcher-plant of China, its seeds, and 

 mode of germination, p. 379. 



* The Editor regrets that part of the Interesting drawings illustrative of the Tripang have been 

 lost in a quarter in London, where they had been deposited some time by the author. Mr Collier 

 has again sailed for India, and promises to transmit to us without delay a further account of those 

 animals, so important in a commercial point of view. 



NEILL & CO. PRINTERS. 



