LONEY: Plane Trigonometry.

By S. L. Loney, M.A.

• An Elementary Course, excluding the Use of Imaginary Quantities.
• Fcap. 8vo.

McCLELLAND y PRESTON: A Treatise on Spherical Trigonometry. With Applications to Spherical Geometry, and Numerous Examples. By William J. McClelland, M.A., and Thomas Preston, B.A. 12mo.

Parte I. $1.10. Parte II. $1.25. Ambas partes en un volumen, $2.25.

NIXON: Elementary Plane Trigonometry. By R. C. J. Nixon. $1.90.

PALMER: Logaritmos prácticos y trigonometría, libro de texto de. Por J. H. Palmer. 16mo. $1.10.

SNOWBALL: The Elements of Plane and Spherical Trigonometry. By J. C. Snowball, M.A. Fourteenth Edition. 12mo. $1.90.

TODHUNTER: Obras de Isaac Todhunter, F.R.S.

para Principiantes. Nueva Edición. 18mo. 60 centavos.

Trigonometry. 12mo. $1.30.

Tratado de trigonometría esférica. Para el