=Gregory's= New Political Economy 1.20 =Jevons's= Political Economy .35 =Laughlin's= Elements of Political Economy 1.20 =Small & Vincent's= Introduction to the Study of Society 1.80 SCIENCE General Science =Clark's= General Science .80 Laboratory Manual in General Science .40 =Doerner's= Treasury of General Knowledge. Part I .50 The same. Part II .65 =Hooker's= Child's Book of Nature 1.00 =Huxley's= Introductory Volume on Science .35 =Steele's= Manual of Science--A Key 1.00 =Wells's= (D. A.) Science of Common Things .85 Astronomy =Bowen's= Astronomy by Observation 1.00 =Burritt's= Celestial Atlas .94 =Lockyer's= Astronomy .35 Elements of Astronomy 1.22 =Newcomb's= Elements of Astronomy 1.00 Popular Astronomy. School Edition 1.30 =Steele's= Popular Astronomy. Revised (M. L. Todd) 1.00 =Todd's= (D.) New Astronomy 1.30 Physics =Adams's= (C. F.) Physics for Secondary Schools 1.20 Teacher's Manual to the same .25 New Physical Laboratory Manual .60 Physical Laboratory Manual .75 =Ames's= Text-Book of General Physics 3.50 Theory of Physics 1.60 =Ames & Bliss's= Manual of Experiments in Physics 1.80 =Appletons'= School Physics 1.20 =Avery's= Elementary Physics 1.00 Key to the same .50 School Physics 1.25 Key to the same .75 First Principles of Natural Philosophy .96 Elements of Natural Philosophy 1.15 Physical Technics and Teacher's Handbook for First Principles and Elements of Natural Philosophy 1.25 =Avery & Sinnott's= First Lessons in Physical Science .60 =Cheston, Dean, & Timmerman's= Laboratory Manual of Physics .50