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Let there be such a ray RC falling upon the surface CK. Make CO perpendicular to RC, and across the angle KCO adjust OK, equal to N and perpendicular to CO; then draw KI, which touches the Ellipse GSP, and from the point of contact I join IC, which will be the required refraction of the ray RC. The demonstration of this is, it will be seen, entirely similar to that of which we made use in explaining ordinary refraction.
Elmer had been so kind to them that all were anxious to do what they could to help him in this time of trouble. Among the first boat-load that Frank ferried across the river was Black Joe, with his "ok" attached to a very small plough, with which he felt confident he could render most valuable assistance.
"What is that noise?" cried Jozsef Bardy, springing from his bed, and rushing to the window. "The Olahok!"* cried a hussar, who had rushed to his master's apartments on hearing the sounds. * Olah, Wallachian ok, plural. "The Olah! the Olah!" was echoed through the corridors by the terrified servants.
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