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  1. Philosophical Transactions, 1813.
  2. O. Schott; Verein zur Beförderung des Gewerbefleisses.4April, 1892, p. 11;See also H. Hovestadt, “Jena Glass.” Translation by J. D. Everett and A. Everett, p. 225London, 1902;D. E. Sharp; J. Am. Ceram. Soc. 4, p. 219–223, 1921.
    [Crossref]
  3. See D. E. Sharp, J. Am. Ceram. Soc.,  4, p. 222; 1921.

1921 (1)

See D. E. Sharp, J. Am. Ceram. Soc.,  4, p. 222; 1921.

1892 (1)

O. Schott; Verein zur Beförderung des Gewerbefleisses.4April, 1892, p. 11;See also H. Hovestadt, “Jena Glass.” Translation by J. D. Everett and A. Everett, p. 225London, 1902;D. E. Sharp; J. Am. Ceram. Soc. 4, p. 219–223, 1921.
[Crossref]

1813 (1)

Philosophical Transactions, 1813.

Schott, O.

O. Schott; Verein zur Beförderung des Gewerbefleisses.4April, 1892, p. 11;See also H. Hovestadt, “Jena Glass.” Translation by J. D. Everett and A. Everett, p. 225London, 1902;D. E. Sharp; J. Am. Ceram. Soc. 4, p. 219–223, 1921.
[Crossref]

Sharp, D. E.

See D. E. Sharp, J. Am. Ceram. Soc.,  4, p. 222; 1921.

J. Am. Ceram. Soc. (1)

See D. E. Sharp, J. Am. Ceram. Soc.,  4, p. 222; 1921.

Philosophical Transactions (1)

Philosophical Transactions, 1813.

Verein zur Beförderung des Gewerbefleisses. (1)

O. Schott; Verein zur Beförderung des Gewerbefleisses.4April, 1892, p. 11;See also H. Hovestadt, “Jena Glass.” Translation by J. D. Everett and A. Everett, p. 225London, 1902;D. E. Sharp; J. Am. Ceram. Soc. 4, p. 219–223, 1921.
[Crossref]

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Figures (3)

F. 1
F. 1

Apparatus suitable for the inspection for strain in optical glass plates. In Fig. 1a a diffusion screen of ground glass illuminated from the rear by an electric lamp, is used; in Fig. 1b the diffusion screen is replaced by a condenser lens system. In both arrangements the lamp is properly housed in a sheet iron box. (a) S is the source of light; D, a diffusion screen of ground glass; G, a plate of opaque glass; P, plate of optical glass; K, sensitive tint plate; N, nicol prism; E, the eye of the observer. (b) D is a diffusion plate; A, pin-hole aperture; L, a condenser lens; S, G, P, K, N and E are the same as in Fig. 1a.

F. 2
F. 2

(a) Strain shown by cords in a well annealed block of glass. (b) strain aureoles in glass surrounding “stones” as shown in polarized light.

F. 3
F. 3

(a) Diagram illustrating the distribution of interference colors observed in polarized light with the aid of a sensitive tint plate about a grain of glass or other material embedded in a glass of higher expansibility. (b) Same as Fig. 3a except that the surrounding glass is of lower expansibility. (c) Distribution of interference colors about an included thread of glass of higher expansibility. (d) Same as Fig. 3c except that the included thread has a lower expansion coefficient.