INDEX. 



1049 



mical solutions; effect of spermato- 

 zoon related to catalytic action, com- 

 pletion of impregnation by endosmosis, 

 975. 



Oxalic acid, production and effects of, in 

 the animal economy, 980. 



Oxamide, production of, from yellow 

 prusside of potassium, 846. 



Oxford clay, belemnites and fossil cepha- 

 lopoda found in, 746, 920. 



Oxygen, new combinations of, 509. 



— , its condition as ozone, 660. 

 — , remarkable case of the formation of, 

 967 ; loss of, in equal equivalent pro- 

 portions fi'om decomposing bodies, 968. 



, paramagnetic condition of, 997. 



Owen (K.), a description of certain be- 

 lemnites, preserved, with a great pro- 

 portion of their soft parts, in the Oxford 

 clay, &c., 505. 



> royal medal awarded to, 636. 



, on the development and homologies 



of the carapace and plastron of the 

 chelonian reptiles, 792. 



, on the development and homo- 

 logies of the molai" teeth of the wart- 

 hogs {phacochcerus) , with illustrations 

 of a system of notation for the teeth in 

 the class mammalia, 916. 



— — on the communications between 

 the tympanum and palate in the cro- 

 codilian reptiles, 927. 



Ozone, production of, by chemical means, 

 507; a constituent of azote, 508; a 

 compound of oxvgen and hvdrogen, 

 565. 



Paget (J.), observations on the freezing of 



the albumen of eggs, 906. 

 Palladium, how extracted from gold, 622. 

 Paret (D.) on the gaseous transformation 



of water, by means of a pile in two 



separate compartments, &c., &c., 911. 

 Pearson (Rev. *W.), obituary notice of, 



712. 



Peel (Sir R.), obituary notice of, 1026. 



Pellatt (A.), practical remarks on anneal- 

 ing flint glass, 750, 



Pelorosaurus,an undescribed gigantic ter- 

 restrial reptile, 921 ; enormous dimen- 

 sions of, 922. 



Phillips (T.), obituai-y notice of, 580. 



Phosphates, acids transferred from, 504. 



, in urine, causes of, 561 ; during 



disease, 608. 



Phosphoric acid, existence of, in igneous 

 rocks, 508. 



Phosphorus, voltaic action of, 557. 



, excreted by the kidneys, 626. 



, converted into tribasic phosphate 



of soda dming respiration, 677. 



Photobarometrograph, 663. 

 Photoelectrogi-aph, description of, 662. 

 Photogenic action, focus of, and visual 



focus non-coincident, 513, 

 , modified by coloured glasses ; 



destroyed by red, orange and yellow 



rays, 680 ; nature and differences of, 



681. 



Photographic instmments, self-register* 

 ing, 662. 



Photography, applied to the registration 

 of magnetic variations, 630, 658, 851. 



Picro-erythrine, 736. 



Plants, analyses of ashes of, 552, 553, 

 554. 



, dhection assumed by, during their 



growth; tendrils of, experiments on 

 their curling, 684. 



Plastron, homologies and development of, 

 793. 



Platinum, ignited, decomposes water, 658. 



, action of, in reconverting gases into 



water, 667. 



Plaj-fair (L.) on the nitroprussides, a new 

 class of salts, 846. 



Poisons, effect of, on the tendrils of 

 plants, 684. 



Pollock (Sir F.) on certain properties of 

 prime numbers, 664. 



on certain properties of the arith- 

 metical series whose ultimate differ- 

 ences are constant, 852. 



on the extension of the principle of 



Fermat's theorem of the polygonal 

 numbers to the higher order of series 

 whose ultimate differences are constant, 

 &c., 922. 



Polygonal numbers, Fermat's principle 

 of, extended to higher order of series, 

 922. 



Polypi, structure and development of 

 liver in, 693. 



Porpoise, . on the blowhole of, 604 ; 

 pouches in the head of, 605, 



Potassium, the positive element in a vol- 

 taic battery of the highest power, 661. 



Powell (Rev. B.) on the elliptic polari- 

 zation of light by reflexion from me- 

 tallic surfaces, 557. 



on a new case of the interference 



of hght, 756. 



Prague, magnetic term-observations at, 

 475. 



Prichard (W. C), obituary notice of, 886. 

 Prime numbers, certain properties of, 



664 ; law of reciprocity of, extensible, 



666. 



Pring (J. H.) on the process of etching, 

 or engra\dng, by means of voltaic elec- 

 tricity, 601. 



Pseudo-orcin, 737. 



8 



