## Contents of Volume 15, Number 4

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- The conic as a space element
- Roger A. Johnson PDF
- Trans. Amer. Math. Soc.
**15**(1914), 335-368

- The Weierstrass $F$-function for problems of the calculus of variations in space
- Gilbert Ames Bliss PDF
- Trans. Amer. Math. Soc.
**15**(1914), 369-378

- The subgroups of the quaternary abelian linear group
- Howard H. Mitchell PDF
- Trans. Amer. Math. Soc.
**15**(1914), 379-396

- Transformations of conjugate systems with equal point invariants
- Luther Pfahler Eisenhart PDF
- Trans. Amer. Math. Soc.
**15**(1914), 397-430

- Proof of the finiteness of the modular covariants of a system of binary forms and cogredient points
- Forbes Bagley Wiley PDF
- Trans. Amer. Math. Soc.
**15**(1914), 431-438

- On the degree of convergence of Sturm-Liouville series
- Dunham Jackson PDF
- Trans. Amer. Math. Soc.
**15**(1914), 439-466

- Singular integral equations of the Volterra type
- Clyde E. Love PDF
- Trans. Amer. Math. Soc.
**15**(1914), 467-476

- On the reduction of integro-differential equations
- Griffith C. Evans PDF
- Trans. Amer. Math. Soc.
**15**(1914), 477-496

- Invariants in the theory of numbers
- L. E. Dickson PDF
- Trans. Amer. Math. Soc.
**15**(1914), 497-503

- Addenda and errata: “Proper multiple integrals over iterable fields” [Trans. Amer. Math. Soc.
**11**(1910), no. 1, 25–36; 1500854] - Ernest B. Lytle PDF
- Trans. Amer. Math. Soc.
**15**(1914), 504-505

- Errata: “Decomposition of an $n$-space by a polyhedron” [Trans. Amer. Math. Soc.
**14**(1913), no. 1, 65–72; 1500936] - Oswald Veblen PDF
- Trans. Amer. Math. Soc.
**15**(1914), 506