548 



INDEX to VOL. XXVII. 



ACIDS, organic, on the peroxides 

 of the radicals of the, 469. 



Airy (G. B.) on the diurnal inequali- 

 ties of terrestrial magnetism, 234. 



Akin (Dr. C. K.) on a new method 

 for the direct determination of the 

 specific heat of gases, 341 ; on 

 thermo-electric currents, 383. 



Alexeyelf (M.) on the preparation of 

 zincethyle, 500. 



Alloys, on the electric conducting- 

 power of, 467- 



Aluminium, on the hexatomicity of, 

 115. 



Anisic acid, on the action of hydriodic 

 acid on, 111. 



Asterism, on the artificial production 

 of, 400. 



Atkinson's (Dr. E.) chemical notices 

 from foreign journals, 107, 496. 



Atmosphere, on the constitution of 

 the, 401. 



Azobenzoates, on the, 502. 



Barometer, on an improved mercu- 

 rial, 386. 



Beilstein (M.) on the preparation of 

 zincethyle, 500. 



Bodenbender (M.) on cumarine, 107. 



Bbttger (M.) on the preparation of 

 thallium, 497. 



Books, new : — Main's Practical and 

 Spherical Astronomy, 64 ; Lynn's 

 First Principles of Natural Philo- 

 sophy, 66; Wharton's Complete 

 Solutions, 67; the Mathematical 

 and other Writings of the late R. 

 L. Ellis, 140; Kirchhoff's Re- 

 searches on the Solar Spectrum, 

 229. 



Brewster (Sir D.) on the stereo- 

 scopic relief in the Chimenti pic- 

 tures, 33. 



Brodie (Sir B. C.) on the peroxides 



of the radicals of the organic acids, 



469. 

 Bromocarbonic acid, 499. 

 Calorific rays, on the diffusion of, 396. 

 Camphor, on the action of nitric acid 



on, 503. 

 Carius (M.) on monosulphomalic acid, 



505. 

 Cayley (A.) on a theorem relating to 



conies, 42; on the sections of a 



quadric surface, 43 ; ' on a nodal 



curve, 437 ; on the theory of cubic 



surfaces, 493. 

 Challis (Prof. J.) on the theory of 



the velocity of sound, 92 ; on the 



dispersion of light, 452. 

 Chambers (C.) on the nature of the 



sun's magnetic action upon the 



earth, 384. 

 Chemical notation, remarks on, 119, 



273. 

 notices from foreign journals, 



107, 496. 

 Cbimenti pictures, on the stereoscopic 



relief in the, 33. 

 Cinnamic acid, on the action of bro- 

 mine on, 110. 

 Clausius (R.) on the difference between 



active and ordinary oxygen, 261. 

 Cockle (Chief Justice) on differential 



' co variants, 225. 

 Cohesion-figures of liquids, on a new 



variety of the, 425. 

 Colding (A.) on the principle of the 



conservation of energy, 56. 

 Conies, analytical theorem relating to, 



42. 

 Croll (J.) on the dynamical theory of 



heat, 196 ; on the influence of the 



tidal wave on the earth's rotation, 



and on the acceleration of the 



