530 



INDEX. 



Chemistry — 



Charcoal, deportment of, with the 

 halogens, nitrogen, sulphur, and 

 oxygen. Mixter, 363. 



Chemical phenomena at low tempera- 

 tures, Pictet. 157, 4=32. 



Crystals, influence of foreign sub- 

 stances on, Retgers, 65. 



Electrolytic gas, temperature of igni- 

 tion, Freyer and V. Meyer. 156. 



Energy as a dimensional unit, Ostwald, 

 251. 



loss of, due to chemical union, 

 Gore, 520. 



Fluosulpbonic acid, Thorpe and Kir- 

 man, 252. 



Freezing points of very dilute solu- 

 tions, Raoult, 67. 



Heat, re-conversion of, into chemical 

 energy, Xaumann, 155. 



Hydrogen, reaction of, with chlorine 

 and oxygen. Harker, 349. 



Hydroxylamine, properties of free, de 

 Bruyn, 430 



Iodine in haloid salts determined by 

 arsenic acid, Gooch and Browning, 

 334. 



Ions, color of, Ostwald, 347. 



electromotive activity of, Nernst 

 and Pauli, 156. 



Lactic acid resolved into optically 

 active constituents, Purdie and 

 Walker, 66. 



Masrium, new element, Richmond and 

 Off, 66. 



Oxygen for lime light, Hepworth. 158. 



Precipitated membranes, permeability, 

 Tammann, 252. 



Precipitates, separation of, at the 

 surface-bounding electrolytes, Kiim- 

 mell, 157. 



Salt-solutions, rise of, in filter papers, 

 Fischer and Schmidmer, 431. 



Solutions, nature of certain, and new 

 means of investigating them, Lea, 

 478. 



Tellurium, double halides of, with 

 potassium, rubidium and caesium, 

 Wheeler, 267. 



Tungstous oxides, Headden, 280. 

 Coast Survey, IT. S., base apparatus of, 



Woodward, 33. 

 Colles. G. W. Jr., distance of the stars 



by Dopjjler's principle. 259. 

 Color photography, Lippman, 68. 

 Colors of cloudy condensation, Barus, 



150, 528. 

 Concave gratings, asymmetry in, Ryd- 



berg. 350. 

 Conrad's works, republication, 335. 



Coral reefs of the West Indies, Agassiz, 



78, 358. 

 Cornu, how blanched seedlings may be 



saved, 356. 

 Crehore, A. O. Alternating Currents, 



435. 

 Cross, W.. igneous rocks of Mexico. 119. 



Dall, W. H., Correlation papers, Neo- 

 cene, 351 ; Tertiary mollusks in Flor- 

 ida, 441. 



Dallmeyer, new lens, 158. 



Dana, E. S , Catalogue of American 

 Mineral Localities, 441. 



Darton. N. H., Oneonta and Chemung 

 formations in eastern central New 

 York, 203 ; Magothy formation of 

 Maryland, 407. ■ 



Dawson, J. D., early Cretaceous floras 

 in Canada and the United States, 439. 



Derby, O. A., nepheline rocks in Brazil, 

 74. 



Diatomaceas, deposit of, Edwards, 385. 



Discoliths in clay beds, Edwards, 526. 



Dodge. F. S., Kilauea, August, 1892, 241. 



Douville, Panama geology, 74. 



Dumble, E. T.. geol. survey of Texas, 

 354. 



E 



Earth, age of the, King. 1 ; Fisher, 464. 

 Edwards, A. M., deposit of diatomacese, 



385 ; Discoliths in clay beds, 527. 

 Electric charges, loss of, in diffuse light 



and in darkness, Branly, 523. 



potential of, Heydneiler, 350. 

 current, force exerted by, Moreland, 



392. 



currents of high frequency, Swin- 



ton. 350. 



waves, interference of, 159. 

 refraction by alcohol, Ellinger. 



254. 

 Electrical oscillations of low frequency 



and their resonance, Pupin. 325, 420, 



.503. 

 Electricity, influence of the character of 



metallic points on discharges of , Wurtz, 



523. 

 Electro-chemical effects due to magnet- 

 ism, Squier, 443. 

 Electromagnetic theory of color disper- 

 sion. Helmholtz, 434. 

 Endlich, F. M , Manual of Qualitative 



Blowpipe Analysis and Determinative 



Mineralogy, 76. 

 Equipotential lines, Lommel, 435. 



