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เนื้อหาย่อ : The productivity, pattern of living, and culture of America depend on the extent to which the simple basic scientific truths about cause and effect are applied to produce new substances, new parts and ingenious mechanisms. Science, which at one time was largely an avocation of learned men, is today planned, purposeful, intensive application of invention and technology by an individual, a group, or an institution. Each seeks to translate and control the physical world by shaping it to meet man's needs. In this quest for fundamental knowledge of man and universe, the scholar-scientist investigates, learns, and builds upon previous knowledge. The knowledge derived is utilized by the inventor who translates theory into fact. It then remains for the technologist, engineer and craftsman to transform knowledge and invention into products and processes having widespread use. "Basic Science I" is the end-product of years of extensive inquiry, study, experimentation and analysis of the fundamental understandings about science needed by all individuals. This first volume of the two-volume series deals with the fundamentals of applied physics. It helps provide an answer to the question: "To what extent and in what areas should a person study the physical sciences to prepare for a vocation, to become an intelligent consumer, and to contribute as an informed member of society?" The units in each Section of "Basic Science I" have been specially selected to provide instruc- tional material for a well-balanced coordinated course based on life needs. At the same time, the scope of the units is such that the contents may be adapted to meet the special needs of students, and to allow for progress according to varying individual abilities and desires. Recognition is made in each unit of the value of organized laboratory work as an essential part of a physics course. Each student has opportunities to do individual exploration, to gather data and evidence through actual participation, to study and interpret results, and to apply both the findings and the principles to other practical situations. Practical problem material is included with each unit. G rateful acknowledgment is made to Elmer A. Rotmans, Head of the Drafting Department, Edison Technical and Industrial High School, Rochester, New York for the skillful interpretation and preparation of all drawings; to Janet Strube, State Library, New York State Education Department, for indexing; to Louis J. Siy, Philip Schuyler High School, Albany, New York; and to Helen C. Cross, Delmar Publishers, Inc. for assistance in preparing the manuscript for publication. Appreciation is expressed also to William G. Dickson, Editor, Delmar Publishers, Inc., for his guidance during each successive stage from development to production; and to those teachers, super- visors and administrators throughout the country who assisted either in the initial study of need for such material, or in the outlining, developing, testing, or final review of the manuscript.