دانلود کتاب The Scientific American book of projects for the amateur scientist

CONTENTS INTRODUCTION BY VANNEVAR BUSH XVII ". . . the motivation of the scientist, professional or amateur, is the sheer joy of knowing." PREFACE BY C. L. STONG XXI ". . . the fact that an experiment delivers an unexpected answer means simply that you have not asked the question you assume you have asked" I. ASTRONOMY 1. ASTRONOMICAL DIVERSIONS 3 A note about the delights of stargazing and some fascinating instruments devised to overcome the limitations of the human eye. 2 . A SIMPL