549 



INDEX to VOL. XX 



ABNEY (Capt. W. de W.) on the 



production of monoclironiatic light 

 on the screen, 172. 



^Ether t on the luroiniferous, 389. 



Air, on the velocity with which, 

 rushes into a vacuum, 531. 



Alcohol, on the electrical resistance 

 of, 301. 



Alkyl compounds of the elements, on 

 the periodic law as illustrated by 

 the, 259, 497. 



Alums, on the specific refraction and 

 dispersion of light by the, 162. 



Atmosphere, on the height of the, 

 408. 



Atmospheric air, on the separation of 

 liquid, into two different liquids, 

 463. 



electricity, on, 456. 



B.A. unit, on the determination of 

 the, in terms of the mechanical 

 equivalent of heat, 1. 



Bidwell (S.) on the sensitiveness of 

 selenium and sulphur to light, 178 ; 

 on the generation of electric cur- 

 rents by sulphur-cells, 328. 

 Bonney (Prof. T. G.) on the so- 

 called diorite of Little Knot, 205. 

 Books, new :— Hoppe's Geschichte 

 der Electrizitat, 70 ; Lefro y's Mag- 

 netic Survey of the North-western 

 Territories, 204; Glazebrook and 

 Shaw's Textbook of Practical 

 Physics, 300 ; Winkler's Technical 

 Gas-analysis, 461 ; Lodge's Ele- 

 mentarv Mechanics, 545 : Latimer 

 Clark's' Transit Tables for 1886, 

 547. 

 Bosanquet (R. II. M.) on electro- 

 magnets, 318. 

 Bourbouze (M.) on a new form of 

 hygrometer, 220. 



Phil. May. S. 5. Vol. 20. No. 127 



Bouty (M.) on the electrical conduc- 

 tivity of solid mercury and the pure 

 metals at low temperatures, 77. 

 Buchanan (J.) on the thermoelectric 



position of carbon, 117. 

 Budde (E.) on the quantity of elec- 

 trical elementary particles, 303. 

 Cailletet (M.) on the electrical con- 

 ductivity of solid mercury and the 

 pure metals at low temperatures, 77. 

 Calculating-machines, observations 



on, 15. 

 Carbon, on the thermoelectric posi- 

 tion of, 117. 

 Carnellev (Prof. T.) on the periodic 



law, 259, 497. 

 Chemical change, on the influence of 

 heat on, 323 ; on the retardation 

 of, 444. 

 Clark (J. VV.) on certain cases of 

 electrolytic decomposition, 37, 

 438 ; on the determination of the 

 heat-capacity of a thermometer, 

 48 ; on the influence of pressure on 

 electrical conduction and decom- 

 position, 435. 

 Colloids, on the disengagement of 

 heat in the swelling and solution 

 of, 220. 

 Coral-reefs and islands, on the origin 



of, 144, 269, 303. 

 Dana (Dr. J. D.) on the origin of 

 coral-reefs and islands, 144, 269, 

 303. 

 Davies (D. C.) on the North- Wales 



and Shrewsbury coalfields, 73. 

 Density-numbers, on the law of, 19, 



191. 

 Dilatancy of media composed of rigid 



particles in contact, on the, 469. 

 Diorite, on the so-called, of Little 

 Knot, 205. 



, Dec. 1885. 2 Q 



