INCLUDED IN THIS MANUAL WRITTEN FOR SECONDARY SCHOOL AND COLLEGE TEACHERS ARE DESCRIPTIONS OF DEMONSTRATION MODELS, EXPERIMENTS PERTAINING TO SOME OF THE FUNDAMENTAL AND APPLIED METEOROLOGICAL CONCEPTS, AND INSTRUCTIONS FOR MAKING SIMPLE WEATHER OBSERVATIONS. THE CRITERIA FOR SELECTION OF TOPICS WERE EASE AND COST OF CONSTRUCTING APPARATUS AS WELL AS THE AVAILABILITY OF MATERIALS. SECTIONS ON GENERAL AND SPECIAL REQUIREMENTS LIST TOOLS REQUIRED TO BUILD THE APPARATUS, INEXPENSIVE ITEMS WHICH MUST BE PURCHASED, AND DIRECTIONS FOR BUILDING SUCH APPARATUS AS LIGHT STANDS, BALANCES, AND SMOKE SOURCES. FOR EACH OF THE DEMONSTRATION MODELS AND EXPERIMENTS IN THE MANUAL THERE ARE (1) A BRIEF DISCUSSION OF THE SCIENCE CONTENT INVOLVED, (2) A LIST OF MATERIALS, (3) DIRECTIONS FOR BUILDING AND USING THE APPARATUS, INCLUDING DIAGRAMS OR PHOTOGRAPHS, AND (4) AN ESTIMATED COST. THE SECTION ON OBSERVATIONS INCLUDE SUCH WEATHER PHENOMENA AS RELATIVE HUMIDITY, AIR PRESSURE, PRECIPITATION, AND CLOUD FORMATIONS. APPENDED IS A LIST OF INEXPENSIVE READING MATERIALS, INCLUDING BOOKS AND PERIODICALS. THIS DOCUMENT IS AVAILABLE FOR $2.00 FROM THE PENNSYLVANIA STATE UNIVERSITY, DEPARTMENT OF METEOROLOGY, 422 MINERAL INDUSTRIES BUILDING, UNIVERSITY PARK, PENNSYLVANIA 16802. (DG)