A New Subspecies of Lizard, Cnemidophorus sacki, from Michoacán, México

Our Calendar The Julian calendar and its errors. How corrected by the Gregorian. Rules for finding the dominical letter, and the day of the week of any event from the days of Julius Caesar 46 B.C. to the year of our Lord four thousand; a new and easy met

A Color Notation A measured color system, based on the three qualities Hue, Value and Chroma

The Doré Bible Gallery, Complete Containing One Hundred Superb Illustrations, and a Page of Explanatory Letter-press Facing Each