INDEX. 
611 
I. 
Irritability , of the measure of, 327. 
greatly increased in hybernation, 346. 
Ivory (James, Esq.). On the theory of the perturbations of the planets, 195. 
L. 
Larynx, its functions as one of the organs of the human voice, 303. 
Lee (Robert, M.D.). On the structure of the human placenta, and its connexion with 
the uterus, 57. 
Lubbock (John William, Esq.). Researches in physical astronomy, 1, 229, 361, 601. 
On the tides, 51. 
Note on the tides in the Port of London, 595. 
M. 
Magnetical experiments, made on the western coast of Africa, an account of, 493. 
Magneto-electric induction, general remarks and illustrations of the force and direction 
’ of, 177. 
Maule (Hon. Lieut. Lauderdale). Extracts from his letter to Dr. Weatheriiead, re- 
specting the female Ornithorhynchus paradoxus, 533. 
Mercury, its specific gravity as determined by Mr. Faraday, 550. 
Mollusca ( marine testaceous), observations on the anatomy and habits of, 497. 
Moon, on the theory of, 1. 
Muscular motility, not impaired in hybernation, 350. 
N. 
Newport (George, Esq.). On the nervous system of the Sphinx ligustri, Linn., and on 
the changes which it undergoes during a part of the metamorphoses of the insect, 
383. 
O. 
Ornithorhynchus paradoxus, on the mammary glands of, 517. 
Osler (Edward, Esq.). Observations on the anatomy and habits of Marine Testaceous 
Mollusca, illustrative of their mode of feeding, 497. 
Owen (Mr. Richard), his letter to Dr. Lee, on an improved method of examining the 
anatomical relations between the placenta and uterus, 64. 
On the mammary glands of the Ornithorhynchus paradoxus, 517. 
P. 
Pendulum, on the correction of, for the reduction to a vacuum ; together with remarks on 
some anomalies observed in pendulum experiments, 399. 
■ ■ reduction to a vacuum, 401. 
