932 



INDEX. 



Porphyritic quartz in basic igneous rocks, 



A. Barker on, 726. 



Potential difference, the assumed, between 

 a metal in the molten and the solid 

 state, Prof. W. Ostwald on, 689. 



Poulton (E. B.) on proposals for the legis- 

 lative protection of wild birds' eggs, 

 366 ; *renewed experiments on the 

 modification of the colours of lepi- 

 dopterous pupaj, 786 ; *an observation 

 bearing on the non-transmission of 

 characters required by certain pupae, 

 ib. 



Power transmission by alternating cur- 

 rent, by G. Kapp, 873. 



Poynting (Prof. J. H.) on electrolysis in 

 its physical and chemical bearings, 72. 



Preece (W. H.) on standards for use in 

 electrical measurements, 132 ; on the 

 dielectric of condensers, 654 ; earth 

 currents, 656 ; the destruction of light- 

 ning protectors by recent municipal 

 legislation, 871 ; secondary batteries 

 in use at the Central Telegraph OfBce, 

 London, for telegraphic purposes, 872. 



♦Prehensile power of infants, the, Dr. L. 

 Robinson on, 909. 



* , exhibition of photographs repre- 

 senting, by Dr. L. Robinson, 914. 



Prehistoric and ancient remains of Gla- 

 morganshire, report on the, 544. 



Pre-palfeolithic flints, exhibition of, by 

 J. M. Bell, 900. 



Pressure produced in gaseous explosions, 

 a new method for measuring the, by 



B. Lean and W. A. Bone, 684. 

 Prestwicl^ (Prof.) on underground tem- 

 perature, 129; on the circulation of 

 underground waters, 264 ; on the erratic 

 blocks of England, Wales, and Ireland, 

 267 ; on the advisability and possibility 

 of establishing observations upon the 

 prevalence of earth tremors, 343. 



*Preyer (Prof. W.) on the physiology of 

 protoplasm, 742. 



Price (L. L.), Adam Smith and his rela- 

 tions to recent economics, 840. 



Primary and secondary batteries in which 

 the electrolyte is a gas. Prof. A. Schus- 

 ter on, 638. 



Prince (Prof. E. E.) on the formation of 

 argenteous matter in the integument 

 of teleosteans, 772; the development 

 of the pharyngeal teeth in the labrids, 

 773. 



Proteid hydrochlorides, by Dr. A. L. 

 Gillespie, 7.50. 



♦Protoplasm, the physiology of. Prof. W. 

 Preyer on, 742. 



Protoplasmic movements, natural rela- 

 tions between temperature and, by 

 Dr. J. Clark, 760. 



Psychology, comparative, the method of, 

 by Prof. C. L. Morgan, 754. 



Purdon and Walters (Messrs.), the utili- 

 sation of the energy of flowing water : 

 description of the Purdon - Walters 

 motor, 866. 



Purdon - Walters motor, description of 

 the, by Messrs, Purdon and Walters, 

 866. 



*Purvis (G. C), sewage precipitation, 

 687. 



Rabl's doctrine of the personality of the 

 segments of the nucleus, and Weis- 

 mann's ' idant ' theory of heredity. 

 Prof. M. Hartog on, 742. 



Radiolarian chert in the Lower Silurian 

 rocks, the contact metamorphism of 

 the, along the margin of the Loch 

 Doon granite, J. Home on, 712. 



of Arenig age, a widespread, from 



the southern uplands of Scotland, B. N. 

 Peach on, 711. 



*Radiolarian remains, supposed, from 

 the Culdaffi limestone, by Prof. W. J. 

 Sollas, 723. 



* , , from the slates of Howth, 



by Prof. W. J. Sollas, 723. 



Railway, an automatic, for the carriage 

 of packages, by D. Cunningham, 864. 



Railwa}^ economics, a plea for the study 

 of, by W. M. Acworth, 842. 



Rainfall in Formosa and some of the 

 effects on the island and mainland of 

 China, by J. Thomson, 811. 



Ramsay (Prof. W.) on electrolysis in its 

 physical and chemical bearings, 72 ; on 

 the action of light on the hydracids of 

 the halogens in presence of oxygen, 

 192 ; on the bibliography of solution, 

 261 ; on the nature of solution, ih. ; 

 on the influence of the silent dis- 

 charge of electricity on oxygen and 

 other gases, 2()3 ; *impurities in chlo- 

 roform, 671 ; *the transpiration of hy- 

 drogen through palladium, 679. 



and Emily Aston, atomic weight of 



boron, 687. 



Ravenstein (E. G.) on the climatological 

 and hydrographical conditions of tro- 

 pical Africa, 367 ; on Prof. A. Penck's 

 proposed map of the world on a scale 

 of 1 : 1,000,000, 817. 



Rawson (Sir R.) on the work of the 

 Corresponding Societies Committee, 29. 



Rayleigh (Prof. Lord) on electrolysis in 

 its physical and chemical bearings, 

 72 ; on standards for use in electrical 

 measurements, 132. 



*Recalescence, interim report on, 658. 



Redgrave (G. R.), flexible metallic 

 tubing, 870. 



Refuse, the disposal of, by G. Watson, 

 860. 



Reid (A. S.) on the collection, preserva- 

 tion, and systematic registration of 



