485 



INDEX to VOL. XLVI. 



Abbott (T. k.) on the "black 



drop " in the transit of Venus, 375. 



Airy (G. B.) on the directive power 

 of large steel magnets and of gal- 

 vanic coils in their action on exter- 

 nal small magnets, 221. 



Ammonia, on the direct synthesis of, 

 336. 



Atmosphere, on the possible existence 

 of a lunar, 411. 



Atwood's machine, on the determi- 

 nation of the friction-resistances in, 

 330. 



Barrett (Prof. W. F.) on molecular 

 changes occurring in iron wire at a 

 low red heat, 472 ; on the relation- 

 ship of the magnetic metals, 478. 



Barthelemy (A.) on the passage of 

 gases through 'colloid membranes 

 of vegetable origin, 251. 



Bauer (K. L.) on the filling of vessels 

 with a very narrow tube, especially 

 the Cartesian diver, 334. 



Bees, on the form of the cells of, 103. 



Bender (C.) on the determination of 

 the friction-resistances in Atwood's 

 machine, 330. 



Bickerton (A. W.) on a new relation 

 between heat and static electricity, 

 450. 



Birt (W. R.) on the moon's libration, 

 305. 



Books, new: — Proctor's Light Science 

 for Leisure Hours, 77 ; Selections 

 from the Portfolio of the Editor of 

 the Lunar Map, 79 ; Astronomical 

 and Meteorological Observations 

 made in 1870 at the United States 

 Naval Observatory, 171 ; Birt's 

 Mare Serenitatis, 250; Proctor's 

 The Moon, her Motions, &c, 312 ; 

 Williamson's Elementary Treatise 

 on the Differential Calculus, 406. 



Camphor, on the motions of, on the 

 surface of water, 376. 



Cartesian diver, on the, 334. 



Cazin (A.) on various cases of inter- 

 mission of the voltaic current, 481. 



Central motions, on the relations be- 

 tween the characteristic quantities 

 occurring in, 1 . 



Challis (Prof.) on the principles of 

 hydrodynamics, 159, 309, 446 j on 

 integrating differential equations 

 by factors and differentiation, 388. 



Champion (M.) on explosions pro- 

 duced by high tones, 256. 



Charles (Dr. T. C.) on the composi- 

 tion of certain coals from co. 

 Tyrone, and of a lignite from Bal- 

 lintoy, 244. 



Chautard (J.) on the spectrum of 

 chlorophyl, 335. 



Chemistry, on statical and dynamical 

 ideas in, 398. 



Chlorophyl, on the spectrum of, 335. 



Circles, on a new method for examin- 

 ing the divisions of graduated, 1 74 . 



Circuits, on induced currents and de- 

 rived, 84. 



Clausius (Prof. R.) on the relations 

 between the characteristic quanti- 

 ties occurring in central motions, 1 ; 

 on a new mechanical theory rela- 

 tive to stationary motions, 236, 

 266. 



Coal, analyses of, from the coal-mea- 

 sures of co. Tyrone, 244. 



Colloid membranes of vegetable ori- 

 gin, on the passage of gases through, 

 251. 



Culley (R. S.) on Jamin's compound 

 magnets, 176. 



Currents, on induced, 84. 



Dana (Prof. J. D.) on some results 

 of the earth's contraction from 

 cooling, and on the origin of 

 mountains, 41, 131, 210, 276, 363. 



Diffraction-grating, on the use of a, 

 in a solar spectroscope, 87. 



