4 3] 



VOLUMES XXXI-XL 



1 L9 



Radiotelegraphy, experiments, 



-tin. 33, 

 Radium, active in an elec- 



tric field, Wellisch, 36, 31S; 38, 

 Wellisch and Bronson, 33, 



: Gulf oi Mexico 

 r, Lloyd. 39. 580. 



— deflections of electrostatic 

 fields, etc., by, Russ, Makower, 

 and Evans, 3 1 - ~ v 



— Discovery oi. Curie. 34, 91. 



— magnetic spectra of p-rays, von 



. cr. Meitner and Halm. 33, 



— preparation. 31, 7?. 



— preparation of metallic. Ebler, 



31. 75- 



— and Radio-activity. Cameron, 



35. 456. 



Radiumbiologie, 38, 369. 

 Radium-uranium ratio in carno- 

 5, Lind and Whittemore, 40, 



Ramsay, R. R., radioactivity ot 



spring water. 40, 309. 

 Rankin, G. A., ternary system 



'-SiO:. 39, I. 

 Raymond, P. E., faunas at Levis. 



Quebec. 38, 523. 

 Rays, see Alpha rays, Cathode 



rays, Delta rays, etc. 



— positive. Wien, 31, 77- 



itive electricity, Thom- 



— Rontgen, see Rontgen-rays. 

 Reckert, F. C, dehydration and 



recovery of silica. 36, 598. 

 Reed, H. S., Bacteriology, 37, 5^5- 

 Reed, J. O., College Physics, 33, 



. 

 Reeds, C. A., Hunton formation 



of Oklahoma. 32, 256. 

 Reedy, J. H., anodic potentials of 



silver, 40, 281, 400. 

 Refractive index determinations 



with sulphur-selenium mixtures. 



Merwin and Larsen, 34, 42. 

 Refrigeration by mixtures of 



li<r laux, 31. 77. 



Relativity and the Ether. Page. 



38. 

 Repulsion of metallic disks, Ba- 



39. r U 

 Reptilian ase and Willie- 

 Reptiles. GFOLOGY. 

 Rheostat, new. Van Nan 



Rice, W. N., geology of Tripyr- 



amid Mountain. X. 11.. 31, 269. 

 Rich, J. L., recent stream trench- 

 ing in New Mexico. 32, 237; 

 large bowlders in gravel depos- 

 it-. 38, 441; physiography and 

 glacial geology oi Cat-kill Mts., 



39. 137. 



Richardson, G. B., Paleozoic sec- 

 tion in northern Utah, 36, 406. 



Ries, C, electric properties of 

 selenium, 36, 422. 



Ries, H., Building Stones and 

 Clay Products, 35, 112; Engi- 

 neering Geology, 38. 102. 



Roberts, E., Famous Chemists. 

 33, 156- 



Roberts, E. J. f separation of ce- 

 rium by potassium permanga- 

 nate. 31, 3^0. 



Robbins, E. R., Plane Trigonom- 

 etry. 31, 248. 



Robinson, E. van D., Geography, 



31, 467- 

 Robinson, W. I., new fresh-water 

 ga-tropods from Arizona Meso- 

 zoic. 40, 649. 

 Rock Creek, Texas, fossils, Lull. 



39, 327: Troxell. 39, 613. 

 Rock Minerals, Iddings, 32, 399. 

 Rocks, Cole, 34, 480. 

 — Origin and Evolution, Vialay, 



35, ??2. 

 ROCKS. 



Alkali-granites and porphyries 

 of Blue Hills, Mass., Warren, 

 36, 655. 

 Alkaline rocks, composition and 



origin. Smyth. 36, 33. 

 Analcite rocks. Tyrrell. 31, 81. 

 Anorthosite. Quebec, 33, 263. 

 Basalt, extrusive in Virginia 

 Cambrian, Watson and Cline, 

 39, r > r >5- 

 Bergalite. 37, 359- 

 Blairmorite, 39, 222. 

 Building Stones. British and 



Foreign, Watson, 32, 232. 

 Canadite, schistose, 40, 4'7- 

 < latahoula sandstone of 'I 



origin, Goldman, 39, 261. 

 ( '• nro de Santa Ana. \ 

 r<>rk- of, Ben drat, 37, 268. 



acher 

 233. 

 l)i.: jity at high tem- 



