Manual of Advanced Optics. Practical Exercises in Light: being a Laboratory Course for Schools of Science and Colleges Elementary Ophthalmic Optics Geometrical Optics: an Elementary Treatise upon the Theory, and its Practical Application to the more Exact Measurements of Optical Properties Das Stereoskop Seine anwendung in den technischen Wissenschaften Über Entstehung und Konstruktion Stereoskopischer Bilder