In _Chemical Science_ there are upwards of 60 New Facts. Among these is a valuable paper on Arsenic, by Dr. Christison, (from the _Philosophical Magazine_;) a method of ascertaining the vegeto-alkali in Bark; the influence of the Aurora Borealis on the Magnetic Needle; Lieut. Drummond's Plan for illuminating Light Houses by a ball of lime, (from the _Philosophical Transactions_); Laws of electrical accumulation, and the decomposition of water by atmospheric and ordinary electricity; the new Indigo; the spontaneous inflammation of charcoal; the nitrous atmosphere of Tirhoot, one of the principal districts in India for the manufacture of salt-petre; Discovery of a mass of meteoric iron in Bohemia; the chemical composition of cheese; Berzelius on the power of metallic rods to decompose water after their connexion with the galvanic pile is broken; an alkaline principle in Box-wood; Professor Davy on a new method of detecting metallic poisons; Mr. Bennet's new alloy for the pivot-holes of watches; experiments with Aldini's Fireproof Dresses; Dr. Ure on the composition of Gunpowder, and on Indigo; Dr. Bostock on the spontaneous purification of Thames water; Abstracts of Berzelius' statement of the progress of Chemical Science for 1829; Mr. Broughton on the effects of oxygen gas on various animals, &c. In _Zoology_ are papers--on the Fern Owl; Mr. Rennie's interesting Notes on the Cleanliness of Animals; Mechanism of the Voice in Singing; the Vision of Birds of Prey; New species of British Snake; Animalculae in Snow; Habits of the Chameleon; Peculiarity of the Negro Stomach; Growth of Spanish Flies; British Pearl Fishery on the Conway; the cause of Goitre; seat of the sense of touch and taste; stones found in the stomach of Pikes; Learned Poodles at Paris; Faculties of Domestic Animals; Increase of Mankind; Larva of the Gad-fly, which deposits its eggs in the bodies of the human species; Luminousness of the Sea, a valuable contribution; Motions in water caused by the respiration of Fishes; Cannibalism in New Guinea; Heron swallowing a Rat; Mr. Vigors on American Quails; Mr. Yarrell's experiments to preserve White Bait; On the fascination of Serpents; Notes on the Zoological Society, &c.