# Rays of Positive Electricity and Their Application to Chemical Analyses/Index

ANALYSIS, use of positive rays for, 106.
Anode rays, 84.
Apparatus for investigating positive rays, 16. 20.
Aston, photographic apparatus designed by, 22.
    —separation of new gas, 113.
Atmosphere, ne\v gas in, 112.
    —gases in, III, 112.
Atoms and molecules, relative intensity of lines due to, 55.
    —in a molecule not oppositely charged, 63·
Austin and Holborn disintegration of: metal by positive rays, 103.
BEADED parabolas, 51.
Bloch dissociation of gases, 65.
Bombardment by cathode rays, gases given off by, 122.
--positive rays, spectra due to, roo, 1 101.
CALCIUM used to face cathode, 19•
Carbon atom with negative charge, 40.
    —molecule with negative charge, 45.
    —monoxide, curve for, 59.
Cathode for producing positive rays, 2I.
    —double, 5, 79•-rays, bombardment by, 1I3, 122.
    ——ionization by, 70.
Charcoal used to produce vacuum, 24.
DECHEND and Hammer, chemical effects produced by rays, 104. Deflection, magnetic, of rays, 7.
    —electrostatic, of rays, II. Disintegration of metal by positive rays, I02.
Doppler effect shown by positive rays, 89·
elm, method of determining, 12.
Electric charge carried by atoms, 53.
Electroscopic method of measuring rays, 56.
Electrostatic deflection of rays, I I.
FRANCK, mobility of ions in Argon, 44
Fulcher, spectrum produced by cathode rays, 54.
    — Döpler effect, 100.
    —bibliography of Döpler effect, 100.
    ———positive rays, 105.
GASES given off when solids are bombarded by rays, 113 et seq.
Gehrcke and Reichenheim, anode rays, 84.
    ———Döppler effects in rays, 93.
Glasson lonizatIon by cathode particles, 70.
Goldstein, discovery of positive rays by, 1.
    —double cathodes, 5.
Granquist disintegration of metals by positive rays, 103.
Grassot flux meter, 10.
Gyllensköld, spectra by bombardment with rays, 101.
Helium, positive rays in, 3, 5, 18.
    —given off by bombardment, 122 et seq.
Holborn and Austin, disintegration of metals by positive rays, 103.
Hydrogen atom with negative charge, 40.
    —and oxygen, curves for, 60.
Hydroxyl radicle, 42.
Ionzation in the rays, 28, 29.
    —causes of, 51.
    —energy required for, 36.
KANALSTRAHALEN, 3.
Kohlschiitter, disintegration of metals by positive rays, 103.
Konigsberger and Kulschewski, effect of gas on velocity of rays, 38.
LITHIUM chloride, phosphorescence produced by positive rays, 3, 80.
MAGNETIC deflection of rays, 7 et seq.
    —field, method of measuring, 9.
Magnets, use of crossed, 31.
Measurement of photographs. 25.
Mercury atom with multiple charges, 47.
    —lines, effect of oxygen on, 116.
Moleules and atoms, relative intensity of lines due to, 45.
    —with negative charges, 45.
Multiply charged atoms, 46.
NEGATIVELY charged particles, 18, 39.
Neon, positive rays in, 2.
    —given off by bombardment of solids, 115, I23.
Neutralization of charge on the rays, 28, 29·
Nickel carbonyl, dissociation of, 64.
Number of rays determined by electroscope, 56.
ORANGE double cathodes, 6.
Oxygen atoms with negative charges, 40.
    —molecules with negative charges, 46.
PARABOLAS formed by rays, 27.
Paschen Döppler effect in positive rays, 91.
Phosgene gas, curve for, 62.
Phosphorescence due to positive rays, 3.
Photographic plates, 4.
Photographs of positive rays, method of taking, 22.
    —measurement of, 25
Potassium iodide gives off large supplies of helium, 124.
Propagation of positive rays, 7.
RAMSAY, Sir W., evolution of helium and neon, 123.
Reichenheim Doppler, effect in positive rays, 97.
    —and Gehrcke, anode rays, 84.
Retrograde rays, 75.
SCHUMANN plates, 4.
Screens, phosphorescent, 4.
Secondary lines, 32.
Smith, dissociation of nickel carbonyl, 64.
Sodium and potassium alloy used to face cathode, 19.
Spectra due to bombardment by positive rays, 100.
Stark, Doppler effect shown by positive rays, 89 et seq.
    —and Steubing Doppler, effect in posi. tive rays. 90-1
    ——Wendt, spectra by bombardment with positive rays, 101.
Strasser Döppler, effect with positive rays, 93.
VELOCITY of rays, method of determining, 12.
Villard retrograde rays, 75.
WIEN, W., discovers magnetic effect of rays, 7.
    ——experiments \vitb oxygen, 14.
    ——free path of positive rays, 38.
    ——method he used to determine elm and v, 13.
    ——negatively electrified particles, 18.
    ——origin of spectra, 97.
Willemite phosphorescence under positive rays, 3.
Wilsar, Döppler effect due to positive rays, 95, 100.
X$_3$ produced by bombarding solids, 116.
    ———heating platinum, 122.
    ————tantalum, 122.
    —can be stored for weeks, 117.
    —combines with mercury vapour, 116.
    ———oxygen in sunlight, 120.
    ————when strongly sparked, 180.
ZINC BLENDE, phosphorescence of, 4.