500 



GENERAL INDEX. 



[22 



Ionization of acids. Drushel and 

 Felty, 43, 57- 



— of iodide solutions. Van Name 

 and Brown, 44, 453. 



Ions and electrons, motion of 

 through gases, Wellisch, 44, 1. 



— and Ionizing Radiations, Crow- 

 ther, 49, 381. 



— recombination by X-rays, Jaun- 

 cey, 42, 146. 



Iowa, Devonian of, Hackberry 

 stage, Fenton, 48, 355. 



— geol. survey. See GEOL. RE- 

 PORTS. 



Iron ore in Wisconsin, Savage and 



Ross, 41, 187. 

 Isostasy, mathematics, Chamber- 



lin. 49, 311; MacMillan, 49, 318. 



— nature and bearings, 48, 281; 

 status of theory, Barrell. 48, 291. 



— and coral reef problem, Molen- 

 graaf, 44, 153. 



— and gravity, Bowie, 43, 249. 



— and the planetesimal theory, 

 >Chamberlin, 42, 371. 



Isostatic compensation, distribu- 

 tion of, Bowie, 43, 471. 



Isotopes, spectra, Merton. 49, 80; 

 melting points, 50, 314. 



Isotopic lead, Clarke, 46, 764; Rich- 

 ards, 47, 224; separation, Rich- 

 ards and Hall, 43, 409. 



Jacoby, H., Navigation, 45, 74. 



Jaggar, T. A., lava flow from 

 Mauna Loa, 1916, 43, 255; vol- 

 canologic investigations at Ki- 

 lauea, 44, 161. 



Jamieson, G. S., double salts of 

 caesium chloride, 43, 67; hydro- 

 gen peroxide determination, 44, 

 150. 



Japan, minerals from, Ichikawa, 42, 

 in; 44, 63; 48, 124. 



— Operculina, Yabe, 47, 80. 



— Ophiuroidea. 44, 404. 



— Tarumai dome, Simotomai, 44, 

 87. 



— Sakura-jima Eruptions, 1914, 

 43, 338. 



Japanese Earthquake Commission, 

 42, 84. 



Jauncey, G. E. M., effect of mag- 

 netic field on recombination of 

 ions by X-rays, 42, 146. 



Jeans, J. H., Cosmogony, 49, 150. 



Jeffrey, E. C, Anatomy of Woody 

 Plants, 45, 152. 



Jenkins, O. P., spotted lakes of 

 epsomite, 46, 638. 



Jewels and Charms, Kunz, 41, 224. 



Jillson, W. R., vertebrate foot- 

 prints in Oklahoma. 44, 56; re- 

 cent eruption of Mt. St. Helens, 

 Wash., 44, 59; migration of head- 

 waters divide of Right Middle 

 Creek, Kentucky, 47, 60. 



Jobling, E., Catalysis, 41, 368. 



John Crerar, Library, bibliographi- 

 cal publications, 41, 379. 



Johnson, C. N., Teeth, 46, 772. 



Johnson, D. W., Shore Processes, 

 48, 395- 



Johnston, J., forms of calcium car- 

 bonate, 41, 473. 



Johnstone, J. H. L., relative activ- 

 ity of radium and uranium, 50, 1. 



Jointing, a factor in degradation of 

 lithosphere. Ehrenfeld. 42, 168. 



Jones, D. F., Inbreeding and Out- 

 breeding, 49, 385. 



Jones, H. C, Nature of Solution, 



44, 78. 



Jones, I. H., Equilibrium and Ver- 

 tigo. 48, 79- 



Jones, T. J., Negro Education. 44, 



487. 

 Jonson, E., law of dissipation of 



motion. 46, 578. 

 Joplin, Mo., zinc and lead deposits, 



Siebenthal, 41, 375- 

 Jordan, E. O., Food Poisoning, 44, 



158. 

 Journal de Physique, 50. 395. 

 Jutson, J. T., rounding of pebbles 



in sub-arid West. Australia, 48, 



429; sheet-flows in the Niagara 



district in West. Australia, 48, 



435- 



K 



Kansas, Comanchean and Dakota 

 strata, Twenhofel, 49, 281. 



— granite in, Powers, 44, 146; 

 Twenhofel, 43, 363; 48, 132. 



Katmai, Alaska, volcanic emana- 

 tions, Shipley, 50, 141. 



Kelp, free carbon monoxide in, 

 Langdon, 43, 165. 



Kempson, E. W. E., Electricity 

 and Magnetism. 41, 146. 



Kentucky, formations of Chester 

 series, Ulrich, 47, 232. 



