INDEX 



715 



fRefractive index and optical dis- 

 persion of air. W. F. Meggers 

 and C. G. Peters. 181. 



*Resonance and ionization poten- 

 tials for electrons in cadmium 

 vapor. P. D. Foote and J. T. 

 Tate. 328. 



*Specific heat of liquid ammonia. 

 N. S. Osborne and M. S. Van 



DtlSEN. 201. 



*Spectro-radiometric investigation 

 of the transmission of various 

 substances. W. W. Coblentz et 

 al. 574. 



*Thermal expansion of alpha and of 

 beta brass between 0°-600°C. P. 

 D. Merica and L. W. Schad. 573. 



Thermoelectric effects, peculiar. P. 

 D. Foote and T. R. Harrison. 

 545. 



Voltage discharge, low, in sodium 

 vapor. P. D. Foote and F. L. 

 MOHLER. 513. 



fX-rays, efficient production of. 

 P. T. Weeks. 253. 



fX-rays, emission quanta phenom- 

 ena in. D. L. Webster. 292. 



fX-ray protective materials. W. 

 S. Gorton. 251. 



See also: Crystallography; Elec- 

 tricity; Radiometry; Radioteleg- 

 raphy; Soil Physics; Spectroscopy; 

 Terrestrial Magnetism. 

 Physiology. Mesencephalic root of 

 'man and the guinea pig, sensory 

 fibers in. W. F. Allen. 15. 



fRed blood corpuscles of the sheep, 

 ox, and hog; their relative resist- 

 ance. M. W. Lyon, Jr. 42. 

 Phytopathology. *Apple-spot diseases, 

 irrigation experiments on. 



Charles Brooks and D. F. 

 Fisher. 563. 



*Bacterial diseases of lettuce. 

 Nellie A. Brown. 564. 



*Blackleg of the potato, influence of 

 temperature and precipitation on. 

 • J. Rosenbaum and G. B. Ramsey. 

 565. 



*Cucumber angular leaf spot. W. 

 W. Gilbert and M. W. Gardner. 

 660. 



fDowny mildews of maize; their 

 origin and distribution. W. H. 

 Weston. 43. 



*Host relationships of North Amer- 

 ican rusts (other than Gymno- 

 sporangiums) attacking conifers. 

 A. S. Rhoads et al. 564. 



*Leafblight of Kalmia latifolia. 

 Ella M. A. Enlows. 563. 



*Okra, hitherto unreported dis- 

 ease of. L. L. Harter. 565. 



fPhysoderma disease of maize. G. 

 R. Lyman. 43. 



*Potato-scab organism, growth of. 

 at various hydrogen-ion concen- 

 trations. L. J. Gillespie. 562. 



fWhite-pine blister rust; biological 

 aspects of its spread. Perley 

 Spaulding. 40. 



Plant Physiology. *Boron: its dis- 

 tribution and effect on crops. 

 F. C. Cook and J. B. Wilson. 

 661. 



Reactions of soils supporting certain 

 orchids. E. T. Wherry. 589. 



*Respiration and catalase activity 

 in sweet corn. C. O. Appleman. 

 632. 



*Sodium nitrate, effect of, on yield, 

 composition, and quality of wheat. 

 J. Davidson and J. A. LeClerc. 

 633. 



*Wheat flour substitutes. J. A. 

 LeClerc. 632. 

 Radiotelegraphy. Contact detectors 

 in radio measurements, new meth- 

 od of using. L. W. Austin. 

 569. 



Resonance measurements in radio- 

 telegraph}^ with the oscillating 

 audion. L. W. Austin. 498. 

 Scientific notes and news: 76, 107, 

 143, 184, 221, 260, 300, 334, 377, 

 415, 460, 508, 543, 568, 579, 611. 



