Excerpt from Avery's Physical Technics and Teacher's Hand-Book, to Accompany the First Principles of Natural Philosophy and the Elements of Natural Philosophy: Containing Solutions to Problems, Descriptions of Inexpensive and Home-Made Apparatus, Many Simple Experiments, Practical Suggestions, Additional Problems and Other Matter Concerning Topics Considered in the Text-Books, Etc, , EtcTo accompény avery's 'natural philosophies, containing so...
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