672 



AUTHOR INDEX 



Roberts, Howard S. *Electrical ap- 

 paratus for use in electrometric 

 titration. 631. 



■ *Electrometric titrations, with 



special reference to the determina- 

 tion of ferrous and ferric iron. 630. 

 *Optical glass, volatilization of 

 iron from ■ pots [used for], by 

 chlorine at high temperatures. 640. 



Rogers, G. S. fSalt domes of the Gulf 

 Coast, origin of the. 291. 



ROHWER, S. A. *Idiogastra, new sub- 

 order of Hymenoptera, with notes 

 on immature stages of Oryssus. 327. 



Rose, J. N. *Cactaceae, descriptions 

 and illustrations of. 408. 



fEcuador, botanical explorations 



in. 205. 



Ross, Donald W. *Silica refractories. 



381. 

 RowLEE, W. W. Ochroma, synopsis of 



the genus, with descriptions of new 



species. 157. 

 Safford, W. E. Dahlia, notes on the 



genus, with descriptions of two 



new, from Guatemala. 364. 



fParadise Key and the surround- 

 ing Everglades, vegetation of. 205. 



vSanford, R. L. t^iagnetic analysis. 



450. 

 Sasscer, E. R. jHydrocyanic acid gas 



and its use in the control of insects. 



82. 

 ScHAD, Lloyd W. *Molybdenum, pre- 

 liminary determination of thermal 



expansion of. 341. 

 ScHALLER, Waldemar T. Plancheite 



and shattuckite, copper silicates. 131. 

 ScHLiNK, F. J. Indicating instruments, 



determinateness of the hysteresis of. 



38. 

 • treasuring instruments, on the 



nature of inherent variability of. 



449- 

 vScHULTz, Alfred Reginald. *Geo- 

 logic reconnaissance for phosphate 

 and coal in southeastern Idaho and 

 western Wyoming. 319. 



Scott, H. *Steel alloy, effect of rate of 

 temperatiu-e change on the trans- 

 formations in a. 446. 



Shaw, Eugene Wesley. *Oil fields of 

 Allen County, Kentucky. 439. 



fSalt domes, stratigraphy of the 



Gulf Coastal Plain as related to. 

 289. 



— — Sedimentation. 513. 



ShufeldT, R. W. ^Sarracenia pur- 

 purea. 177. 



fWood tortoise, exhibition of a 



young specimen of. 656. 



SiLSBEE, F. B. Conductivity of insu- 

 lating materials at high tempera- 

 tures, methods of measuring. 252, 

 352. 



Skillman, Edward. *Tiles, hollow 

 building, tests of. 343. 



Snodgrass, R. E. tinsects, fruit, notes 

 and exhibition of water-color draw- 

 ings of. 23. 



Snyder, Thomas Elliott. *Ternite 

 castes, phylogenetic origin of. 229. 



SOMERS, R. E. Clays, microscopic ex- 

 amination of. 113. 



SosMAN, Robert B. fFumaroles, tem- 

 perature inversions in the, of Valley 

 of Ten Thousand Smokes, Alaska. 

 292. 



§Matters of scientific interest in 



the Sixty-Sixth Congress. 42 1 , 454, 

 535. 562, 645. 



— ■ — • fVolcanic explosions. 296. 

 StandlEy, Paul C. *Flora of the Dis- 

 trict of Columbia and vicinity. 



553- 

 Stebinger, Eugene. '''Oil and gas 



geology of the Birch Creek — Sun 



River area, Montana. 443. 

 Stephenson, Lloyd William. *Geol- 



ogy of northeastern Texas and 



southern Oklahoma. 531. 

 Stose, G. W. fManganese deposits of 



the Appalachian Valley of Virginia 



and Tennessee. 383. 

 — — fTravertine from Rock Creek 



Park, District of Columbia. 292. 



