INDEX. 



1041 



Fleming (G. 0.) on motion in the lumbar 

 division of the spine in birds, 605. 



FKnt, fossil forarainifera in, 627. 



Floating bodies, on the oscillations of, 

 954. 



Fluid, absorption of, by plants, 502. 

 Fluids, electric and magnetic, supposed 



properties of, oil . 

 Fluxions, dispute about the invention of, 



599. 



Foraminifera, fossil remains of, in chalk 



and flint, 627. 

 Forbes (J. D.), royal medal awarded to, 



478. 



on the viscous theory of glacier 



motion, 550, 595, 603. 



, an attempt to establish by observa- 

 tion the plasticity of glacier ice, 595. 



■ , illustrations of the viscous theory 



of glaciers, 603. 



Forces, vital and physical, on the rela- 

 tions of ; assimilation transformations, 

 maintenance of living organisms, dif- 

 ferent modes of one and the same force, 

 989 ; nervous force correlated to elec- 

 tricity, light, heat, chemical affinity 

 and mechanical motion, heat and the 

 organizing forces correlated, 990. 



Forms, membranous, arising from physi- 

 cal causes, 560. 



Formula, for the elastic force of vapours, 

 discussed and modified, 739. 



Forster (E.), obituary notice of, 885. 



Fownes (G.) on the existence of phos- 

 phoric acid in rocks of igneous origin, 

 508. 



, account of the artificial formation 



of a vegeto-alkali, 542. 

 on benzoMne, a new organic salt base 



obtained from oil of bitter almonds, 



555. 



on the value of absolute alcohol in 



spirits of different specific gravity, 682. 



, obituary notice of, 882. 



Fractures, effects of on the urine, 608. 



Franklin (Sir J,), thanks voted for the 

 aid of U.S. government in the search 

 for ; President's letter thereupon, 828. 



Frog, tongue of, microscopical examina- 

 tion of, 751 ; papillae, structm-e and 

 description of ; capillary vessels, nerves 

 and muscular fibres in ; the neuro- 

 vascular area in ; difference of papillae, 

 conical papillae, those of touch, fungi- 

 form, of taste, their ciliary movement, 

 its purpose, 752 ; comparisons, 753. 



■ , section of the glossopharyngeal and 



hypoglossal nerves of, and obsei-va- 

 tions of the alterations produced there- 

 by in the structure of their primitive 

 fibres, 924 ; glossopharyngeal the nerve 



of taste, hypoglossal of motion, 925 ; 

 division of either pair causes death, 

 more speedily in summer than in 

 winter ; structure changed on division 

 of one nerve only, disappearance of 

 the nerve fibres, their integrity de- 

 pendent on nutrition, 925. 



Frog, influence of physical agents on the 

 development of, 949. 



Fucusol, obtained from sea weeds, con- 

 version into fucusine, 940. 



Fnrfuroamide, 543. 



Furfurol, chemical composition and pro- 

 perties of, 542. 



Galloway (T.) on the proper motion of 

 the solar system, 670. 



, royal medal awarded to, 772. 



Galvanic currents, in the blood, 732 ; 

 importance of in physiological and pa- 

 thological inquiry, 734. 



Galvanism, in the muscles, origin of, 734. 



Gangua of the virgin uterus, 661. 



Gases, liquefaction and solidification of, 



540, 547 ; behaviour under pressure, 



541, 542, 



, on the motion of, 848 ; relation in 



the transpirability of different gases ; 

 transpiration velocity of hydrogen 

 double that of nitrogen — identity be- 

 tween carbonic oxide and nitrogen ; 

 oxygen and nitrogen transpire in equal 

 weights, 849 ; transpiration time of 

 carbonic acid inversely proportional to 

 its density time of transpiration ac- 

 cording to density; resistance of ca- 

 pillary tube; velocity diminished by 

 rarefaction, increased by density, 850 ; 

 flow of coal gas in pipes, influenced by 

 temperature, 851. 



, magnetic condition of, 997. 



Gassiot (J. P.), description of an exten- 

 sive series of the water battery, &c., 

 500 ; additional note on, 507. 



Gas voltaic battery, 557 ; new form of, 

 558. 



Gay-Lussac (J. L,), obituary notice of, 

 1013. 



Geology, physical, researches on, 659. 



Gillies (Lieut. S. M.), letter to Lieut.-Col. 

 Sabine, on the U.S. astronomical ex- 

 pedition, 990. 



— — , an account of astronomical obser- 

 vations proposed to be made in South 

 America, 768. 



Glaciers, viscous theory of, 550-595 ; 

 motion of, 603. 



Glaisher (J.) on the amount of the ra- 

 diation of heat, at night, from the earth, 

 and from various bodies placed on or 

 near the surface of the earth, 663. 



