## Contents of Volume 67, Number 2

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- Principal quadratic functionals
- Walter Leighton PDF
- Trans. Amer. Math. Soc.
**67**(1949), 253-274

- On the semi-continuity of double integrals
- Paul V. Reichelderfer PDF
- Trans. Amer. Math. Soc.
**67**(1949), 275-285

- The imbedding theorem for fibre bundles
- Shiing-Shen Chern and Yi-Fone Sun PDF
- Trans. Amer. Math. Soc.
**67**(1949), 286-303

- Parallelisability of principal fibre bundles
- Shiing-Shen Chern and Sze-Tsen Hu PDF
- Trans. Amer. Math. Soc.
**67**(1949), 304-309

- The topology of ordered Abelian groups
- L. W. Cohen and Casper Goffman PDF
- Trans. Amer. Math. Soc.
**67**(1949), 310-319

- On the growth of derivatives of functions omitting two values
- A. S. Galbraith, W. Seidel and J. L. Walsh PDF
- Trans. Amer. Math. Soc.
**67**(1949), 320-326

- Some problems in conformal mapping
- J. A. Jenkins PDF
- Trans. Amer. Math. Soc.
**67**(1949), 327-350

- On the distribution of the characteristic values and singular values of linear integral equations
- Shih-Hsun Chang PDF
- Trans. Amer. Math. Soc.
**67**(1949), 351-367

- Continued fractions with absolutely convergent even and odd parts
- R. E. Lane and H. S. Wall PDF
- Trans. Amer. Math. Soc.
**67**(1949), 368-380

- On the degree of polynomial approximation to harmonic and analytic functions
- J. L. Walsh, W. E. Sewell and H. M. Elliott PDF
- Trans. Amer. Math. Soc.
**67**(1949), 381-420

- Coset representations in free groups
- Marshall Hall PDF
- Trans. Amer. Math. Soc.
**67**(1949), 421-432

- On a monotone singular function and on the approximation of analytic functions by nearly analytic functions in the complex domain
- H. Kober PDF
- Trans. Amer. Math. Soc.
**67**(1949), 433-450

- Concerning upper semi-continuous collections of continua
- R. D. Anderson PDF
- Trans. Amer. Math. Soc.
**67**(1949), 451-460

- The asymptotic solutions of ordinary linear differential equations of the second order, with special reference to a turning point
- Rudolph E. Langer PDF
- Trans. Amer. Math. Soc.
**67**(1949), 461-490

- Abelâ€™s theorem and a generalization of one-parameter groups
- J. F. Ritt PDF
- Trans. Amer. Math. Soc.
**67**(1949), 491-497