INDEX. 
613 
Sphinx ligustri, Linn., nerves of the head, in the larva of, 385. 
nerves of the thorax, in the larva of, 387. 
nerves of the abdomen, in the larva of, 388. 
T. 
Terrestrial magneto-electric induction, 163. 
Tides, on the, 51. 
Tides in the Port of London, note on, 595. 
Torpedo, experiments and observations on, 259. 
— experiments on the electricity of, 260. 
on the electrical organs of, &c., 265. 
Torpor , from cold, distinct from true hybernation, 353. 
Trachea, its functions as an organ of the human voice, 300. 
V. 
Vacuum apparatus, confined space of, 462. 
Voice {human), on the organs of, 299. 
Volcano, account of a new one in the Mediterranean, 237. 
further notice of, 251. 
Voltaic electricity and electro-magnetism, experimental researches in, 279. 
W. 
Water and mercurial barometers, registers of the temperature and height of, 551, 553. 
Water-Barometer erected in the hall of the Royal Society, on the, 539. 
curious action of the column of water in windy weather, 573. 
4 K 
MDCCCXX XII. 
