5G2 



INDEX. 



Hydrodynamical equations which ex- 

 press vortex-motion, on the inte- 

 grals of the, 485. 



Hydrogen, on solid phosphuretted, 

 61. 



Induction-currents, on the produc- 

 tion of, by the twisting of the iron 

 wires through which a galvanic cur- 

 rent is passed, 238. 



experiments, 481. 



machines, on the means of in- 

 creasing the quantity of electri- 

 city in, 63. 



Insolation, on the relation of, to at- 

 mospheric humidity, 391. 



Integrals, on the conversion of, 537- 



Iodine, on the acetate of, 143 ; on the 

 atomic weight of, 193. 



Isomerism, observations on, 1. 



Janssen (M.) on certain lines of the 

 solar spectrum, 78. 



Kincaid (S. B.) on the estimation of 

 star-colours, 557. 



Ladd (W.) on a magneto-electric 

 machine, 544. 



Ladenburg (M.) on some compounds 

 of silicon, 451. 



Le Roux (P. F.) on the velocity with 

 which a disturbance, produced in a 

 gaseous mass, is propagated, 398. 



Lieben (M.) on the chlorinated ethers, 

 449. 



Liebreich (M.) on protagon, 448. 



Light, on the direction of vibrations 

 in polarized, 319. 



, electric, on the stratifications of 



the, in very rare media, 241. 



Liquid films, on the tension of, 270. 



Liquids, on some phenomena con- 

 nected with the adhesion of liquids 

 to, 401. 



Lithium, on the atomic weight of, 

 204. 



Loewy (M.) on the distribution of 

 solar spotted areas in heliographic 

 latitude, 79. 



Mach (E.) on an arrangement for the 

 graphical representation of curves 

 of vibration, 159. 



Magnet, on the augmentation of the 

 power of a, by reaction, 471. 



Magnetism, on the action of, upon 

 the electric discharge in rarefied 

 gaseous media, 512. 



Magneto-electric machines, on certain 

 points in the theory of some, 543. 



;nus (Prof.) on the influence of 

 the adhesion of vapour in experi- 

 ments on the absorption of heat, 

 413. 



Mascart (M.) on the direction of vi- 

 brations in polarized light, 319. 



Maxwell (J. C.) on the theory of the 

 maintenance of electrical currents 

 by mechanical work, 474. 



Mellitic acid, on the constitution of, 

 449. 



Meteoric shower of November 14th, 

 1866, observations on the, 81, 156, 

 157, 234, 282. 



Mills (Dr. E. J.) on isomerism, I. 



Mineralogy of South America, re- 

 searches on thei 131 ; of Nova 

 Scotia, contributions to the, 336. 



Molecular actions, on some of the 

 conditions of, 360. 



Moore (J. C.) on the influence of the 

 obliquity of the ecliptic on climate, 

 536. 



Murray (B. A.) on a rigorous demon- 

 stration of the 12th axiom of Eu- 

 clid, 264. 



Muscular action, on the wave-lengths 

 of the transmission of, 118. 



Nervous action, on the wave-lengths 

 of the transmission of, 118. 



Neumann (Dr. E. C. O.) on an appa- 

 ratus for the direct measurement of 

 the velocity of sound in the atmo- 

 sphere, 36. 



Neurine, on the preparation and con- 

 stitution of, 449. 



Niaudet-Breguet (M.) on the applica- 

 tion of the tuning-fork to horology, 

 240. 



Nitrogen, on the determination of, 

 61 : on the atomic weight of, 205. 



Operators, on the multiplication of 

 partial differential, 48. 



Particles, on a mode of measuring the 

 average size of very fine, 540. 



Pencil-stone, analysis of, 337. 



Pfaundler (M.) on the thermal capa- 

 city of various kinds of soils, 56. 



Physical quantities, on the definitions 

 of, 88. 



Pierre (Prof. V.) on the thermal ra- 

 diation produced by fluorescence, 

 316. 



Plateau (Prof. J.) on figures of equi- 

 librium of a liquid mass without 

 weight, 39. 



