522 
INDEX. 
N. 
Nitroprussides, a Nevj Class of Salts, on the. Section I. 477. Section II. General remarks on 
the Nitroprussides, 485. Nitroprussic acid, 486. Nitroprusside of sodium, 487 ; of potas- 
sium, 490 ; of barium, 492 ; of silver, 493 ; of copper, 495 ; of iron, 496 ; of zinc, 497. Sec- 
tion III. On changes in solutions of Nitroprussides, 498. Section IV. On the action of 
caustic alkalies in nitroprussides, 508. Section V. Action of an Alkaline Sulphuride on a 
Nitroprusside, 511. Action of sulphuretted hydrogen on nitroprussides, 513. On the con- 
stitution of the nitroprussides, 516. 
Notommata, description of an infusory animalcule allied to, 331. 
O. 
Osteology of Iguanodon and Hylfeosaurus, 271. 
Owen (Professor). On the Development and Homologies of the Carapace and Plastron of the 
Chelonian Reptiles, 151. 
P. 
Palmitic acid, 96. 
Petaurus taguanoides and sciureus, on the dentinal tissues of, 408. 
Phalangista vulpina, on the dentinal tissues of, 407. 
Phascolomys Wombat, on the dentinal tissues of, 406. 
Placoid and Ganoid Fish, on the structure of the scales and dermal teeth of, 435. 
Playfair (Dr. Lyon). On the Nitroprussides, a New Class of Salts, 477. 
Potass (caustic), its influence on the acidity of the urine, 261. 
Q. 
Qumto-nitrated erythromannite, 399. 
R. 
Pain, fall of, at various heights above the earth’s surface, 13, 319. 
Reptilia, structure of the liver in, 122. 
Rhissostomidce, anatomy of, 413. 
S. 
Sabine (Lieut.-Colonel). Contributions to Terrestrial Magnetism, No. IX. 173. 
Salts, a new class of, the nitroprussides, 477. 
Sten HOUSE (Dr. John). Examination of the proximate Principles of some of the Lichens, 393. 
Sulphate of Iron, magnecrystallic condition of, 37. 
Sulphates, variation of, in urine, 252. 
T. 
Tartaric acid and tartrate of potash, their influence on the acidity of the urine, 261. 
Terrestrial magnetism. Contributions to, No. IX. 173. 
