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References

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  1. J. C. Hubbard and A. L. Loomis, Nature,  120, p. 189; Aug.6, 1927;Phys. Rev.,  31, p. 158; 1928 (abstract);Phil. Mag.,  5, pp. 1177–1190; June, 1928.
    [CrossRef]
  2. G. W. Pierce, Proc. Am. Acad.,  60, pp. 269–302; 1925.
    [CrossRef]
  3. Langevin, Brit. Pat. Spec., N. S. No. 145691, p. 457; 1920.
  4. R. W. Wood and A. L. Loomis, Phil. Mag.,  4, pp. 417–436; 1927.
  5. Let u be velocity of sound in cm/sec., λ the wave length in the liquid in cm, then u= nλ = 500,000×2×λ/2=106×λ/2. Or, u= λ/2 if u is in m/sec, and λ in meters ×10−4.
  6. Six radial cuts are made from the outer edge of the circle toward the center, alternate segments are then bent in opposite directions.
  7. The instruments of this type have been constructed by Mr. Charles M. Childs in the instrument shop of the department of physics at the Johns Hopkins University.
  8. In the work with mercury the liquid was contained in a pyrex beaker, the bottom of which was ground plane inside and out, set upon the top electrode of the quartz plate. The piston in this case was made of the bottom of a small pyrex beaker ground plane after being fused to a pyrex tube to serve as piston rod.
  9. Phil. Mag, loc. cit.
  10. Handbuch der Physik,  8, p. 642.

1927 (2)

J. C. Hubbard and A. L. Loomis, Nature,  120, p. 189; Aug.6, 1927;Phys. Rev.,  31, p. 158; 1928 (abstract);Phil. Mag.,  5, pp. 1177–1190; June, 1928.
[CrossRef]

R. W. Wood and A. L. Loomis, Phil. Mag.,  4, pp. 417–436; 1927.

1925 (1)

G. W. Pierce, Proc. Am. Acad.,  60, pp. 269–302; 1925.
[CrossRef]

Hubbard, J. C.

J. C. Hubbard and A. L. Loomis, Nature,  120, p. 189; Aug.6, 1927;Phys. Rev.,  31, p. 158; 1928 (abstract);Phil. Mag.,  5, pp. 1177–1190; June, 1928.
[CrossRef]

Langevin,

Langevin, Brit. Pat. Spec., N. S. No. 145691, p. 457; 1920.

Loomis, A. L.

J. C. Hubbard and A. L. Loomis, Nature,  120, p. 189; Aug.6, 1927;Phys. Rev.,  31, p. 158; 1928 (abstract);Phil. Mag.,  5, pp. 1177–1190; June, 1928.
[CrossRef]

R. W. Wood and A. L. Loomis, Phil. Mag.,  4, pp. 417–436; 1927.

Pierce, G. W.

G. W. Pierce, Proc. Am. Acad.,  60, pp. 269–302; 1925.
[CrossRef]

Wood, R. W.

R. W. Wood and A. L. Loomis, Phil. Mag.,  4, pp. 417–436; 1927.

Handbuch der Physik (1)

Handbuch der Physik,  8, p. 642.

Nature (1)

J. C. Hubbard and A. L. Loomis, Nature,  120, p. 189; Aug.6, 1927;Phys. Rev.,  31, p. 158; 1928 (abstract);Phil. Mag.,  5, pp. 1177–1190; June, 1928.
[CrossRef]

Phil. Mag. (1)

R. W. Wood and A. L. Loomis, Phil. Mag.,  4, pp. 417–436; 1927.

Proc. Am. Acad. (1)

G. W. Pierce, Proc. Am. Acad.,  60, pp. 269–302; 1925.
[CrossRef]

Other (6)

Langevin, Brit. Pat. Spec., N. S. No. 145691, p. 457; 1920.

Let u be velocity of sound in cm/sec., λ the wave length in the liquid in cm, then u= nλ = 500,000×2×λ/2=106×λ/2. Or, u= λ/2 if u is in m/sec, and λ in meters ×10−4.

Six radial cuts are made from the outer edge of the circle toward the center, alternate segments are then bent in opposite directions.

The instruments of this type have been constructed by Mr. Charles M. Childs in the instrument shop of the department of physics at the Johns Hopkins University.

In the work with mercury the liquid was contained in a pyrex beaker, the bottom of which was ground plane inside and out, set upon the top electrode of the quartz plate. The piston in this case was made of the bottom of a small pyrex beaker ground plane after being fused to a pyrex tube to serve as piston rod.

Phil. Mag, loc. cit.

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Figures (11)

F. 1
F. 1

Photograph of two types of sonic interferometer.

F. 2
F. 2

Sonic interferometer. Moving crystal type.

F. 3
F. 3

Sonic interferometer for deep immersion in a thermostat, stationary crystal.

F. 4
F. 4

Simple form of oscillator for driving crystal of the interferometer.

F. 5
F. 5

Ensemble for double heterodyne method.

F. 6
F. 6

Vernier condenser readings (arbitrary scale) as a function of piston displacement, double heterodyne method, showing sudden dip through nodes at O.

F. 7
F. 7

Constant frequency generator with tuned secondary and thermo-galvanometer.

F. 8
F. 8

Galvanometer readings as a function of piston displacement, passing through a node.

F. 9
F. 9

Velocity of sound in water and in mercury as a function of temperature.

F. 10
F. 10

Velocity of sound in solutions of NaCl as a function of temperature.

F. 11
F. 11

Curve A; velocity of sound at 16°C in solutions of NaCl as a function of per cent by weight of salt. Curves B, D, and V; calculated and measured values of other observers, reproduced from Handbuch der Physik, 8, p. 642.

Tables (1)

Tables Icon

Table 1 25.35% Solution, NaCl t = 22.05° C.