469 



INDEX to VOL. XLV. 



ACOUSTIC pyrometer, on an, 18. 



Air-pump, on the invention of the 

 water, 153. 



Airy (Sir G. B.) on a supposed altera- 

 tion in the amount of astronomical 

 aberration of light, 306. 



Alcohol, on the expansion of the su- 

 perheated vapour of, 417. 



Amblygonite, on a new locality for, 

 309. 



Aqueous vapour, on the relation be- 

 tween the pressure and the volume 

 of saturated, which expands in pro- 

 ducing work, 77 > 



Area, on the first extension of the 

 term to the case of an autotomic 

 plane circuit, 450. 



Arithmetical irrationality, on, 191. 



Astronomy, notes on American, 462. 



Benoist (M.) on the electrical resist- 

 ance of metals, 314. 



Bessemer-flame, on the spectrum of 

 the, 81. 



Bigelow (F. H.) on a method of mea- 

 suring induced currents, 467. 



Birt (W. R.) on the great barometric 

 depression of January, 156. 



Bismuth, on the effects of magnetiza- 

 tion in changing the dimensions of 

 bars of, 350. 



Books, new : — Mayer's The Earth a 

 great Magnet, 65; Lockyer's At- 

 mosphere of the Sun, 66 ; Webb's 

 Celestial objects for common Tele- 

 scopes, 382 ; Piazzi's Smyth's Re- 

 port to the Board of Visitors of the 

 RoyalObservatory, Edinburgh, 382; 

 Anderson's Strength of Materials 

 and Structures, 457 ; Symons's Bri- 

 tish Rainfall, 1872, 459; Weekly 

 Weather Reports, 460. 



Bosanquet (R. H. M.) on an experi- 

 mental determination of the rela- 

 tions between the energy and appa- 

 rent intensity of sounds of different 

 pitch, 173; on the measure of in- 

 tensity in the theories of light and 

 sound, 215 ; on just intonation in 



. music, 307. 



Bruce Warren (T. T. P.) on a method 

 of testing submarine telegraph cables 

 during paying-out, 199. 



Bunsen (Prof. R.) on the invention of 

 the water air-pump, 153. 



Carbon, sulphide of, on the expansion 

 of the superheated vapour of, 409. 



Chloroform, on the expansion of the 

 superheated vapour of, 415. 



Chromosphere, on a method of view- 

 ing the, 222. 



Cornu (A.) on a new determination 

 of the velocity of light, 394. 



Davis (A.) on the vibrations which 

 heated metals undergo when in con- 

 tact with cold material, 296. 



De Haan (D. Bierens) on certain early 

 logarithmic Tables, 371. 



De Luynes (V.) on the sudden cooling 

 of melted glass, 464. 



Deprez (M.) on the determination of 

 the velocity of projectiles optically, 

 398. 



Des Cloizeaux (A. O.) on anew loca- 

 lity of Amblygonite, and on the 

 new mineral Montebrasite, 309. 



Dewar (J.) on the vapour-density of 

 potassium, 384. 



Diffraction, researches on, 365. 



Dittmar (W.) on the vapour- density 

 of potassium, 384. 



Du Moncel (Th.) on the conditions 

 requisite for the maximum of resist- 

 ance of galvanometers, 317. 



Electric discharges, on the actions of, 

 on gases and vapours, 154. 



Electrical resistance of metals, on the, 

 314. 



Electricity and heat, on a new relation 

 between, 308. 



Electromagnetic induction machines, 

 on some improvements in, 439. 



Electromagnetism, on, 80. 



Electroscope, on the action of a con- 

 ductor arranged symmetrically 

 round an, 235. 



Encke's comet, observations on, 159. 



Everett (Prof.) on the optics of mi- 

 rage, 161,248. 



