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  1. Proc. Nat. Acad. Sciences,  2, p. 683; 1916.
    [CrossRef]
  2. Phys. Rev.,  17, p. 7; 1921.
    [CrossRef]
  3. Taken from C. F. Hills curve Fig. 3 for a temperature of 26.3°C; Phys. Rev.,  20, p. 265; 1922.
  4. The ion current of .5 divisions with liquid air on the trap is probably due entirely to the steady evolution of gas from the walls of the ionization gauge.
  5. Wright in The American Journal of Science,  13, p. 49; 1877, probably had a large surface of gold compared to the rate of diffusion of the mercury vapor. The chances are, too, that the spectrum of mercury would have shown up in a few days of continuous exposure of the gold leaf to the vapor.
    [CrossRef]

1922 (1)

Taken from C. F. Hills curve Fig. 3 for a temperature of 26.3°C; Phys. Rev.,  20, p. 265; 1922.

1921 (1)

Phys. Rev.,  17, p. 7; 1921.
[CrossRef]

1916 (1)

Proc. Nat. Acad. Sciences,  2, p. 683; 1916.
[CrossRef]

1877 (1)

Wright in The American Journal of Science,  13, p. 49; 1877, probably had a large surface of gold compared to the rate of diffusion of the mercury vapor. The chances are, too, that the spectrum of mercury would have shown up in a few days of continuous exposure of the gold leaf to the vapor.
[CrossRef]

Hills, C. F.

Taken from C. F. Hills curve Fig. 3 for a temperature of 26.3°C; Phys. Rev.,  20, p. 265; 1922.

Wright,

Wright in The American Journal of Science,  13, p. 49; 1877, probably had a large surface of gold compared to the rate of diffusion of the mercury vapor. The chances are, too, that the spectrum of mercury would have shown up in a few days of continuous exposure of the gold leaf to the vapor.
[CrossRef]

Phys. Rev. (2)

Phys. Rev.,  17, p. 7; 1921.
[CrossRef]

Taken from C. F. Hills curve Fig. 3 for a temperature of 26.3°C; Phys. Rev.,  20, p. 265; 1922.

Proc. Nat. Acad. Sciences (1)

Proc. Nat. Acad. Sciences,  2, p. 683; 1916.
[CrossRef]

The American Journal of Science (1)

Wright in The American Journal of Science,  13, p. 49; 1877, probably had a large surface of gold compared to the rate of diffusion of the mercury vapor. The chances are, too, that the spectrum of mercury would have shown up in a few days of continuous exposure of the gold leaf to the vapor.
[CrossRef]

Other (1)

The ion current of .5 divisions with liquid air on the trap is probably due entirely to the steady evolution of gas from the walls of the ionization gauge.

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Figures (5)

Fig. 1
Fig. 1

Diagram of apparatus.

Fig. 2
Fig. 2

Tube used for purification of sodium.

Fig. 3
Fig. 3

Sample runs of data. Curve 1 was obtained two days after the introduction of the sodium into the trap. Curve 2 was obtained two days later than curve 1.

Fig. 4
Fig. 4

Curve for the whole series of readings with sodium in the trap. Part 1 shows the decrease in the “Gas effect.” Part 2 shows the straight line increase in the mercury vapor pressure passing the trap.

Fig. 5
Fig. 5

Table of results.