INDEX. 
905 
N. 
Neutral axis, experimental determination of the, in beams of wrought iron, 480. 
O. 
CEnanthylene, obtained from Boghead coal, 743. 
Organic acids, on a new series of, containing nitrogen, 59 (see Frankland). 
Organo-metallic bodies, researches on, 59 (see Frankland). 
Owen (Professor). On the Scelidothere, 101. 
Description of the Foetal Membranes and Placenta of the Elephant [Elephas Indicus, 
Cuv.), with Remarks on the value of placentary characters in the classification of the Mammalia, 
347. 
P. 
Parthenogenesis in the Articulata, 95. 
Phosphorus-bases, researches on the, 575 (see Hofmann). 
Photo-chemical researches. Part I. 355 ; Part II. 381 ; Part III. 601 (see Bunsen). 
Pippian, 415 (see Cayley). 
Placentary characters, value of, in the classification of Mammalia, 347. 
Polyedra, on autopolar, 217. 
Quippian, 415 (see Cayley). 
Q. 
R. 
Rainey (George, Esq.). On the Structure and Development of the Cysticercus cellulosce, as found in 
the Muscles of the Pig, 111. 
Rankine (W. J. M., Esq.). On the Stability of Loose Earth, 9. 
Regelation of ice, 329. 
Repi'oduction in Daphnia, two methods of, 79. 
Resistance of flexure, 463 (see Barlow). 
Resultant of a system of two equations, 703. 
Roscoe (Dr. H. E.) and Bunsen (Professor R.). Photo-chemical Researches, 601 (see Bunsen). 
Rotifera, on the dioecious character of the, 313. 
Sabine (Major-General Edward). On the Evidence of the existence of the Decennial Inequality in the 
Solar-diurnal Magnetic Variations, and its non-existence in the Lunar-diurnal Variation, of the 
Declination at Hobarton, 1. 
On Hourly Observations of the Magnetic Declination made by 
Captain Rochfort Maguire, R.N., and the Officers of H.M.S. ‘ Plover,^ in 1852, 1853 and 1854, 
at Point Barrow, on the shores of the Polar Sea, 497. — Register of the hourly observation.s, 515. 
Scelidothere, on the, 101. 
Silica, formula of, 533. 
