566 



INDEX. 



Climate, on the physical theory of 

 secular changes of, 81, 142, 275, 

 367. 

 Collins (J. H.) on the serpentine and 

 associated rocks of Porthalla Cove, 

 324. 

 Copper-antimony alloys, on the elec- 

 tric conductivity and other proper- 

 ties of the, 270. 

 Croll (Dr. J.) on the physical theory 

 of secular changes of climate, 81, 

 275, 367. 

 Crystals, on a method of investigating 

 the thermoelectricity and piezo- 

 electricity of, 328. 

 Dana (Prof.) on the elevation of land 



during the glacial period, 245. 

 Dewar (Prof.) on the temperature of 



sun-spots, 302. 

 Diffraction, on the dynamical theory 



of, 413. 

 Dobbie (Dr. J. J.) on an easy method 

 of determining the specific gravity 

 of solids, 459. 

 Doughty (C. M.) on the geology of 



Arabia, 325. 

 Dykes, penological notes on some 



North-of-England, 321. 

 Dynamo-electrical machines, on the 

 theory of, 46, 119; on a method 

 of measuring the energy rendered 

 by, 159 ; on the theory of the 

 transmission of power by, 518. 

 Earth, on the magnitude of the uni- 

 polar induction of the, 493. 

 Earth currents, observations on, 559. 

 Edgeworth (F. G.) on the reduction 



of observations, 135. 

 Edlund (Prof. E.) on the magnitude 

 of the unipolar induction of the 

 earth, 493. 

 Electric conductivity of the copper- 

 antimony alloys, on the, 270. 

 Electricity, on the causes of the pro- 

 duction of atmospheric, 245, 492, 

 493. 

 Electro-dynamometer, on a method 

 of determining experimentally the 

 constant of an, 111. 

 Electromagnetic disturbance, on the 

 propagation of an arbitrary, 413. 



induction in conducting sheets 



and solid bodies, on, 1, 326. 

 Electromagnets, on, 531. 

 Electro-measuring instruments, on 



direct-reading, 304. 

 Electromotive force, on the determi- 



nation of chemical affinity in terms 

 of, 282, 377. 

 Equation of differences of the second 



order, on the general, 115. 

 Ergometer, note on the, 59, 160. 

 Eutexia, on, 462. 



Fluids, on the change in the volumes 

 and refractive indices of, produced 

 by hydrostatic pressure, 65. 

 Fuchs (Prof. F.) on some acoustical 



experiments, 410. 

 Galvanometer, on a new solenoidal, 



248. 

 Gases, on the rate of chemical ab- 

 sorption of, with regard to their 

 interdiffusion, 352. 

 Geological Society, proceedings of 



the, 71, 321, 557. 

 Glacial period, on the elevation of 



land during the, 245. 

 Guthrie (F.) on Eutexia, 462. 

 Hall's phenomenon, observations on, 



80, 249, 400. 

 Hasselberg (Dr. B.) on the second 



spectrum of hydrogen, 329. 

 Helmholtz (H. von) on the determi- 

 nation of the moments of magne- 

 tism by the balance, 75. 

 Hicks (Dr. H.) on the Cambrian con- 

 glomerates, 71. 

 Himstedt (Prof. F.) on electromag- 

 netic induction in spheres, 326. 

 Holtz (W.) on the production of 



atmospheric electricity, 492. 

 Hood (J. J.) on the rate of chemical 

 absorption of gases, with regard to 

 their interdiffusion, 352. 

 Hunt (Dr. T. S.) on a classification 



of the natural sciences, 74. 

 Hutcheson (J. B.) on an easy me- 

 thod of determining the specific 

 gravity of solids, 459. 

 Hydrogen, on the second spectrum 



of, 329. 

 Ice, on the properties of, 156. 

 Induction-compass, on a new method 

 of determining the magnetic incli- 

 nation with the, 407. 



magnetic compass, on an, 78. 



Insulating support, on a new, 134. 

 Integrator, on a new form of roller 



for the disk-and-roller, 59, 160. 

 Interdiffusion, on the electromotive 

 force set up during, 282. 



of gases, on the, 352. 



Iron, on the heating of, by discon- 

 tinuous magnetization, 409. 



