BY RICHARD A. PROCTOR. A New Star Atlas. For the library, school, and observatory. In 12 circular maps, with two index plates. With letter-press introduction to the study of the stars. Illustrated by wood-cuts. Third edition. Octavo $1 75 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. 12mo, with illustrations on stone and wood $I 25 Half-Hours with the Stars. A plain and easy guide to a 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. Maps and text specially prepared for American students. Quarto, boards $2.00 Larger Star Atlas. Showing 6,000 stars and 1,500 objects of interest in 12 circular maps on the equi-distant projection, with two colored index plates, including all the stars to the fifth magnitude and the constellation figures, with letter-press introduction. Folio Easy Star Lessons. With 48 star maps and 35 other illustrations. octavo G. P. PUTNAM'S SONS, PUBLISHERS, NEW YORK. $6.00 Crown $250 |