INDEX. 



471 



Manometric flames, experiments on, 

 1, 105. 



Maschke (O.) on the development of 

 heat by the friction of liquids 

 against solids, 400. 



Mayer (Dr. A. M.) on an acoustic 

 pyrometer, 18 ; on the experimen- 

 tal determination of the relative in- 

 tensities of sounds, 90 ; on the 

 powers of various substances to 

 transmit and reflect sonorous vibra- 

 tions, 96 ; on a simple device for 

 projecting on a screen the deflec- 

 tions of the needles of a galvano- 

 meter, 280 ; on the effects of mag- 

 netization in changing the dimen- 

 sions of iron, steel, and bismuth 

 bars, 350. 



Metals, on the vibrations which 

 heated, undergo when in contact 

 with cold material, 296 ; on the 

 electrical resistance of, 314. 



Microscope object-glass, on a new 

 formula for a, 224. 



Mirage, on the optics of, 161, 248. 



Montebrasite, characters and compo- 

 sition of, 309. 



Moon, on the radiation of heat from 

 the, 390. 



Moon (R.) on the definition of inten- 

 sity in the theories of light and 

 sound, 38, 361 ; on the law of ga- 

 seous pressure, 100. 



Moutier (J.) on the thermal effects of 

 magnetization, 157 ; on the heat of 

 transformation, 236. 



Muir (T.) on the first extension of the 

 term area to the case of an auto- 

 tomic plane circuit, 450. 



Music, on just intonation in, 307. 



Nitric acid gas, on the action of sul- 

 phurous acid gas upon, 24. 



Noble (Captain) on the pressure re- 

 quired to give rotation to rifled 

 projectiles, 204. 



Orion, on the spectrum of the great 

 nebula in, 133. 



Percy (Dr. J.) on a crystallized com- 

 pound of sesquioxide of iron and 

 lime, 455. 



Phosphorescence and fluorescence, on 



the relation between, 63. 

 Pierre (Is.) on the determination of 

 the boiling-poiut of liquefied sul- 

 phurous acid, 240. 



Pisani (M.) on the chemical constitu- 

 tion of Montebrasite, 311. 



Potassium, on the vapour-density of, 

 384. 



Projectiles, on the pressure required 

 to give rotation to rifled, 204 ; on 

 a new method of determining the 

 velocity of, 398. 



Pyrometer, on an acoustic, 18. 



Quincke (G.) on diffraction, 365. 



Resal (H.) on the relation between 

 the pressure and the volume of 

 saturated aqueous vapour which 

 expands in producing work with 

 neither addition nor subtraction of 

 heat, 77. 



Resistances, on an advantageous me- 

 thod of measuring small, 245. 



Resonance, on the effect of internal 

 friction on, 176. 



Rosse (Earl of) on the radiation of 

 heat from the moon, 390. 



Royal Astronomical Society, 239. 



Royal Society, Proceedings of the, 

 67, 133, 218, 306, 384. 



Rupert's drops, observations on, 464. 



Salisbury (The Marquis of) on spec- 

 tral lines of low temperature, 241. 



Schwendler (L.) on differencial gal- 

 vanometers, 263. 



Seabroke (G. M.) on a new method 

 of viewing the chromosphere, 222. 



Smith (H. A.) on the chemistry of 

 sulphuric acid-manufacture, 23, 

 121. 



Solar prominences, on the wide-slit 

 method of viewing the, 306. 



Solids, on the motion of rigid, in 

 a liquid circulating irrotationally 

 through perforations in them or in 

 a fixed solid, 332. 



Sound and light, on the definition of 

 intensity in the theories of, 38, 160, 

 215, 359, 361. 



Sounds, on the representation of, 8 ; 

 on the experimental determination 

 of the relative intensities of, 90 ; 

 on the decomposition of, into their 

 simple tones, 105 ; on an experi- 

 mental determination of the rela- 

 tion between the energy and appa- 

 rent intensity of, of different pitch, 

 173. 

 Spectral lines of low temperature, on, 

 241. 



