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INDEX to VOL. XII 



Actinium, on the dti^m- of the ,3 ]?Tt 

 emitted by, 177; $n. the ionization 

 ranges of the ex. rav%pf, 244 ; hix 

 the mass and velocity **ri#4kS&* 

 particles expelled from, 348. 

 Albumen, on double refraction in, 

 produced by electric endosmose, 

 556. 

 Alloys, on the electrical resistance 



of, 604. 

 Alpha particle, from radium, on the 

 retardation of the, in passing- 

 through matter, 134 : on the mass 

 and velocitj' of the, from radium 

 and actinum, 348 ; on the mass of 

 the, from thorium, 371. 



rays, of radiothorium, on some 



properties of the, 82 ; of actinium, 

 on the ionization ranges of the, 

 244 ; on the recombination of ions 

 made by, 273. 

 Antennae, on the electric radiation 



from bent, 588. 

 Aqueous solutions, on the molecular 



constitution of, 1. 

 Argon, on the evolution of gas from 



the cathode in, 481. 

 Astronomical physics, on questions 



connected with, 570. 

 Atmosphere, on the radioactive 



matter in the, 189. 

 Atomic conductivities of the ions, on 



the, 150, 532. 

 Bakker (Dr. G.) on the theory of 



surface-forces, 557. 

 Baldwin (J. M.) on the propagation 

 of longitudinal waves of magnetic 

 flux along iron wires and rods, 

 433. 

 Bald win- Wiseman (W. R.) on the 

 influence of pressure and porosity 

 on the motion of subsurface water, 

 531. 



3, on the lateral vibration of, 



^Barton (Prof. E. II.) on simultaneous 

 vibration -curves of string and 

 air obtained from a monochord, 

 576. 



Beta rays, on the origin of the, 

 emitted by thorium and actinium, 

 177 : on the recombination of ions 

 made by, 273 : on the coefficient 

 of absorption of the, from uranium, 

 379. 



Blackmail (P.) on the atomic con- 

 ductivities of the ions, 150, 532. 



Bouney (Prof. T. G.) on the relations 

 of the chalk and boulder-clay near 

 Royston, 169. 



Books, new : — Jager's Die Fort- 

 schritte der kinetischen Gastheorie, 

 93 ; Dennstedt and Yoigtlauder's 

 Baumert's Lehrbuch der Gericht- 

 lichen Ckemie, 94 ; Schmid's 

 Philosophisches Lesebuch, 94 ; 

 Zahikjanz's Die Theorie, Ber- 

 echnung und Konstruktion der 

 Dampfturbinen, 95 ; "Wood's 

 Physical Optics, 162 ; Barus's 

 Xucleation of the Uncontami- 

 nated Atmosphere, 164 ; Guarini's 

 Derniers Progres du Telpherage 

 Electrique, 164 ; Muir's Theory of 

 Determinants, 431 ; Strong's 

 Lectures on the Method of 

 Science, 431 ; Xiethammer's Mo- 

 teurs a Collecteur a Courants 

 Alternatifs, 432; Fleming's The 

 Principles of Electric Wave Tele- 

 graphy, 525 ; v. Neumayer's An- 

 leitung zu Wissenscbaftlichen 

 Beobachtungen auf Reisen, o26 ; 

 Vogl's Die Physik Roger Bacos, 

 527 ; Jamin's Cours de Physique 

 de l'Ecole Poly technique, 527; 



