WHAT TO EAT. A Manual for the Housekeeper: giving a Bill of Fare for every day in the year. 134 Pages. Cloth, 75 cts. "Compact, suggestive, and full of good ideas."--_Many Housekeepers._ "It can hardly fail to prove a valuable aid to housekeepers who are brought to their wits' end to know what to get for the day's meals."--_San Francisco Bulletin._ Putnams' Series of Popular Manuals. HALF-HOURS WITH THE MICROSCOPE. (Shortly.) By EDWIN LANKESTER, M.D., F.R.S. Illustrated by 250 Drawings from Nature. 12mo, cloth, $1.25. "This beautiful little volume is a very complete manual for the amateur microscopist. * * * The 'Half-Hours' are filled with clear and agreeable descriptions, whilst eight plates, executed with the most beautiful minuteness and sharpness, exhibit no less than 250 objects with the utmost attainable distinctness."--_Critic._ HALF-HOURS WITH THE TELESCOPE: Being a popular Guide to the Use of the Telescope as a means of Amusement and Instruction. Adapted to inexpensive instruments. By R. A. PROCTOR, B.A., F.R.A.S. 12mo, cloth, with illustrations on stone and wood. Price, $1.25. "It is crammed with starry plates on wood and stone, and among the celestial phenomena described or figured, by far the larger number may be profitably examined with small telescopes."--_Illustrated Times._ HALF-HOURS WITH THE STARS: A Plain and Easy Guide to the Knowledge of the Constellations, showing in 12 Maps, the Position of the Principal Star-Groups Night after Night throughout the Year, with introduction and a separate explanation of each Map. True for every Year. By RICHARD A. PROCTOR, B.A., F.R.A.S. Demy 4to. Price, $2.25. "Nothing so well calculated to give a rapid and thorough knowledge of the position of the stars in the firmament has ever been designed or published hitherto. Mr. Proctor's 'Half-Hours with the Stars' will become a text-book in all schools, and an invaluable aid to all teachers of the young."--_Weekly Times._ MANUAL OF POPULAR PHYSIOLOGY: Being an Attempt to Explain the Science of Life in Untechnical Language. By HENRY LAWSON, M.D. 18mo, with 90 Illustrations. Price, $1.25. Man's Mechanism, Life, Force, Food, Digestion, Respiration, Heat, the Skin, the Kidneys, Nervous System, Organs of Sense, &c., &c., &c. "Dr Lawson has succeeded in rendering his manual amusing as well as instructive. All the great facts in human physiology are presented to the reader successively; and either for private reading or for classes, this manual will be found well adapted for initiating the uninformed into the mysteries of the structure and function of their own bodies."--_Athenaeum._ A DICTIONARY OF DERIVATIONS Of the English Language, in which each word is traced to its primary root. Forming a Text-Book of Etymology, with Definitions and the Pronunciation of each word. 16mo, $1.00.