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  1. E. L. Nichols, Sci.,  55, p. 157; 1922.
    [CrossRef]
  2. E. L. Nichols and H. L. Howes, J.O.S.A.,  6, No. 1, p. 42; 1922.
    [CrossRef]
  3. J. Kunz and J. Stebbins, Phys. Rev.,  7, (Ser. 2) p. 62; 1916.
    [CrossRef]
  4. E. F. Seiler, Astrophys. J.,  52, No. 3, p. 129; 1920.
    [CrossRef]
  5. The pump used was a Cenco Hyvac, rpm 200-240, driven by a Cenco motor on a 110 volt current.
  6. The induction coil was a Thordarson Type 6, operated by a 6 volt current.
  7. W. S. Andrews, Gen. El. Rev.,  28, No. 2, p. 103; 1925.
  8. W. S. Andrews, Gen. El. Co. Private communication.
  9. E. MacDougall, A. W. Stewart, and W. Wright, J.C.S. 111, p. 663; 1917.
  10. T. Tanaka, J.O.S.A. 8, No. 5, p. 659; 1924.
    [CrossRef]
  11. E. S. Hedges and J. E. Myers, J.C.S.,  125, p. 604, and p. 1282; 1924.
  12. W. Z. Ostwald, physikal. Chem.,  35, 33, p. 204, 1900.
  13. G. Bredig and I. Z. Weinmayr, physikal. Chem.,  42, p. 601; 1903.
  14. E. MacDougall, E. Stewart, and R. Wright, J.C.S.,  111, pp. 663–683; 1917.
  15. Regular glass filters—Wratten filters.
  16. W. P. Headden, A.J.Sci.,  5, p. 314; 1923.
  17. W. P. Headden, A. J. Sci 6, p. 247; 1923.
    [CrossRef]
  18. W. P. Headden, Colo. Sci., Soc.,  11, p. 399; 1923.
  19. T. Tanaka, J.O.S.A.,  8, p. 287; 1924.
    [CrossRef]
  20. T. Tanaka, J.O.S.A.,  8, No. 2, pp. 295– 299; 1924.

1925 (1)

W. S. Andrews, Gen. El. Rev.,  28, No. 2, p. 103; 1925.

1924 (4)

T. Tanaka, J.O.S.A. 8, No. 5, p. 659; 1924.
[CrossRef]

E. S. Hedges and J. E. Myers, J.C.S.,  125, p. 604, and p. 1282; 1924.

T. Tanaka, J.O.S.A.,  8, p. 287; 1924.
[CrossRef]

T. Tanaka, J.O.S.A.,  8, No. 2, pp. 295– 299; 1924.

1923 (3)

W. P. Headden, A.J.Sci.,  5, p. 314; 1923.

W. P. Headden, A. J. Sci 6, p. 247; 1923.
[CrossRef]

W. P. Headden, Colo. Sci., Soc.,  11, p. 399; 1923.

1922 (2)

E. L. Nichols, Sci.,  55, p. 157; 1922.
[CrossRef]

E. L. Nichols and H. L. Howes, J.O.S.A.,  6, No. 1, p. 42; 1922.
[CrossRef]

1920 (1)

E. F. Seiler, Astrophys. J.,  52, No. 3, p. 129; 1920.
[CrossRef]

1917 (2)

E. MacDougall, A. W. Stewart, and W. Wright, J.C.S. 111, p. 663; 1917.

E. MacDougall, E. Stewart, and R. Wright, J.C.S.,  111, pp. 663–683; 1917.

1916 (1)

J. Kunz and J. Stebbins, Phys. Rev.,  7, (Ser. 2) p. 62; 1916.
[CrossRef]

1903 (1)

G. Bredig and I. Z. Weinmayr, physikal. Chem.,  42, p. 601; 1903.

1900 (1)

W. Z. Ostwald, physikal. Chem.,  35, 33, p. 204, 1900.

Andrews, W. S.

W. S. Andrews, Gen. El. Rev.,  28, No. 2, p. 103; 1925.

W. S. Andrews, Gen. El. Co. Private communication.

Bredig, G.

G. Bredig and I. Z. Weinmayr, physikal. Chem.,  42, p. 601; 1903.

Headden, W. P.

W. P. Headden, A.J.Sci.,  5, p. 314; 1923.

W. P. Headden, A. J. Sci 6, p. 247; 1923.
[CrossRef]

W. P. Headden, Colo. Sci., Soc.,  11, p. 399; 1923.

Hedges, E. S.

E. S. Hedges and J. E. Myers, J.C.S.,  125, p. 604, and p. 1282; 1924.

Howes, H. L.

E. L. Nichols and H. L. Howes, J.O.S.A.,  6, No. 1, p. 42; 1922.
[CrossRef]

Kunz, J.

J. Kunz and J. Stebbins, Phys. Rev.,  7, (Ser. 2) p. 62; 1916.
[CrossRef]

MacDougall, E.

E. MacDougall, A. W. Stewart, and W. Wright, J.C.S. 111, p. 663; 1917.

E. MacDougall, E. Stewart, and R. Wright, J.C.S.,  111, pp. 663–683; 1917.

Myers, J. E.

E. S. Hedges and J. E. Myers, J.C.S.,  125, p. 604, and p. 1282; 1924.

Nichols, E. L.

E. L. Nichols, Sci.,  55, p. 157; 1922.
[CrossRef]

E. L. Nichols and H. L. Howes, J.O.S.A.,  6, No. 1, p. 42; 1922.
[CrossRef]

Ostwald, W. Z.

W. Z. Ostwald, physikal. Chem.,  35, 33, p. 204, 1900.

Seiler, E. F.

E. F. Seiler, Astrophys. J.,  52, No. 3, p. 129; 1920.
[CrossRef]

Stebbins, J.

J. Kunz and J. Stebbins, Phys. Rev.,  7, (Ser. 2) p. 62; 1916.
[CrossRef]

Stewart, A. W.

E. MacDougall, A. W. Stewart, and W. Wright, J.C.S. 111, p. 663; 1917.

Stewart, E.

E. MacDougall, E. Stewart, and R. Wright, J.C.S.,  111, pp. 663–683; 1917.

Tanaka, T.

T. Tanaka, J.O.S.A. 8, No. 5, p. 659; 1924.
[CrossRef]

T. Tanaka, J.O.S.A.,  8, p. 287; 1924.
[CrossRef]

T. Tanaka, J.O.S.A.,  8, No. 2, pp. 295– 299; 1924.

Weinmayr, I. Z.

G. Bredig and I. Z. Weinmayr, physikal. Chem.,  42, p. 601; 1903.

Wright, R.

E. MacDougall, E. Stewart, and R. Wright, J.C.S.,  111, pp. 663–683; 1917.

Wright, W.

E. MacDougall, A. W. Stewart, and W. Wright, J.C.S. 111, p. 663; 1917.

A. J. Sci (1)

W. P. Headden, A. J. Sci 6, p. 247; 1923.
[CrossRef]

A.J.Sci. (1)

W. P. Headden, A.J.Sci.,  5, p. 314; 1923.

Astrophys. J. (1)

E. F. Seiler, Astrophys. J.,  52, No. 3, p. 129; 1920.
[CrossRef]

Colo. Sci., Soc. (1)

W. P. Headden, Colo. Sci., Soc.,  11, p. 399; 1923.

Gen. El. Rev. (1)

W. S. Andrews, Gen. El. Rev.,  28, No. 2, p. 103; 1925.

J.C.S. (3)

E. MacDougall, A. W. Stewart, and W. Wright, J.C.S. 111, p. 663; 1917.

E. S. Hedges and J. E. Myers, J.C.S.,  125, p. 604, and p. 1282; 1924.

E. MacDougall, E. Stewart, and R. Wright, J.C.S.,  111, pp. 663–683; 1917.

J.O.S.A. (4)

T. Tanaka, J.O.S.A.,  8, p. 287; 1924.
[CrossRef]

T. Tanaka, J.O.S.A.,  8, No. 2, pp. 295– 299; 1924.

T. Tanaka, J.O.S.A. 8, No. 5, p. 659; 1924.
[CrossRef]

E. L. Nichols and H. L. Howes, J.O.S.A.,  6, No. 1, p. 42; 1922.
[CrossRef]

Phys. Rev. (1)

J. Kunz and J. Stebbins, Phys. Rev.,  7, (Ser. 2) p. 62; 1916.
[CrossRef]

physikal. Chem. (2)

W. Z. Ostwald, physikal. Chem.,  35, 33, p. 204, 1900.

G. Bredig and I. Z. Weinmayr, physikal. Chem.,  42, p. 601; 1903.

Sci. (1)

E. L. Nichols, Sci.,  55, p. 157; 1922.
[CrossRef]

Other (4)

Regular glass filters—Wratten filters.

The pump used was a Cenco Hyvac, rpm 200-240, driven by a Cenco motor on a 110 volt current.

The induction coil was a Thordarson Type 6, operated by a 6 volt current.

W. S. Andrews, Gen. El. Co. Private communication.

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Figures (9)

F. 1
F. 1

Set-up of apparatus

F. 2
F. 2

Key for diagram and photograph of set-up of apparatus. ACathode ray tubeBBatteriesCCell box—cell insideEPipe to earthGGalvanometerIInduction coilKKey for main circuitK′Key to dampen galvanometerPAir pumpRResistanceSCord on pulley to open and close shutterTTelescopeWWires in covered tubesW′Wires for grounding

F. 3
F. 3

Amounts of Nd2O3

F. 4
F. 4

Amounts of Cb3O5 and CeO2

F. 5
F. 5

Amounts of Tl(NO3) and MoO3

F. 6
F. 6

Effects of mixing

F. 7
F. 7

Time of fusion of zinc silicate

F. 8
F. 8

Temperature of fusion of zinc silicate

F. 9
F. 9

Rate of decay of luminescence of zinc silicate

Tables (6)

Tables Icon

Table 1 Effect of different sensitizers

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Table 2 Comparison of ortho and meta silicates

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Table 3 Relation of heating and mixing

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Table 4 Phosphorescence of CaS and ZnS when excited by lights of different colors

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Table 5 Color changes in fluorescence of zinc silicates

Tables Icon

Table 6 Similar compounds

Equations (2)

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Ca ( H 2 PO 4 ) 2 + heat Ca ( PO 3 ) 2 + 2 H 2 O
ZnO + SiO 2 ZnSiO 3