Crystals, further observations on the optical phenomena of, 29. 
on the optical phenomena of, 25. 
D. 
Dalton (John, D.C.L.). Sequel to an essay on the constitution of the atmosphere, published in 
the Philosophical Transactions for 1826; with some account of the sulphurets of lime, 347. 
Daniell (J. Frederic, Esq.). Further observations on voltaic combinations, 141. 
Dispersion of light, researches towards establishing a theory of, 19. 
Double chloride of copper and ammonium, formula for, 73. 
nitrates and supernitrates, not proved to exist, 62. 
oxalates, on, 52. 
E. 
Electric currents of low tension, a continuous current absolutely necessary, when applied to the 
reduction of metallic oxides, 45. 
— observations on the electro-chemical influence of, 37. 
Equations , analysis of the roots of, 161. 
F. 
Farre (Arthur, M, B.). Observations on the minute structure of some of the higher forms of 
polypi, with views of a more natural arrangement of the class, 387. 
G. 
Graham (Thomas, Esq.). Inquiries respecting the constitution of salts, of oxalates, nitrates, 
phosphates, sulphates, and chlorides, 47. 
H. 
Height of high water, fluctuations of, due to changes in the atmospheric pressure, note on, 103. 
I. 
Insects, on the temperature of, &c., 259. 
temperature of, as connected with the other functions of life. 1. Respiration, 310; 
2. Circulation, velocity of, 311 ; 3. Digestion, 319; 4. Gaseous, or cutaneous expenditure of 
the body, 319. 
temperature of different tribes of, viz. Melolontha vulgaris, 283 ; Melolontlia solstitialis, 
285; Lucanus cervus, 286; Coccinella septernpunctata, 286; Meloe proscar abceus, and M. vio- 
laceus, 287 ; Gryllus viridissimus, 287 ; Staphylinus olens, and S. erythropterus, 288 ; Ca- 
rabus monilis, C. violaceus, and C. nemoralis , 288 ; Blaps mortisaga, 289. 
temperature of some which live in society. 1 . of the nests of Bornbus terrestris under 
observation, 294 ; 2. in its natural haunts, 295; 3. Nurse Bees, voluntary power of generating 
heat, 296 ; 4. Hive Bee, during winter, 299 ; 5. free heat, quantity of in the hive, 307 ; hive, 
mean temperature of during summer and winter, 309. 
temperature of the different states of, viz. larva, 264; pupa, 269; imago, 270. 
temperature of, as influenced by abstinence, 272 ; inactivity, 272 ; sleep, 273; hyberna- 
tion, 275; inordinate excitement, 280. 
Integral calculus , researches in, 1. 
Ipoh, or upas poison of the Malay peninsula, 427. 
J. 
Jones (Thomas Wharton, Esq.). On the first changes in the ova of Mammifera in consequence 
of impregnation, and on the mode of origin of the chorion, 339. 
