Well's natural philosophy : for the use of schools, academies and privte students, introducing the latest results of scientific discovery and research ; arranged with special reference to the practical application of physical science to the arts and the experiences of everyday life ; with three hundred and seventy-five engravings (1873)
Wells, David A · New York : Ivison, Blakeman, Taylor and Co. · leaf 54
t from a per-fectly upright jwsition, is an exampleof this principle. For instance, theline in Fig. 18, falling from the topof the tower to the ground, andpassing through the center of gravity,falls within the base, and the towerstands securely. If) however, anattempt had been made to build… … 60 WELLSS NATURAL PHILOSOPHY. the base of a body, and the nearer its principal mass is tothe base, or, in other words, the lower its cen-ter of gravity is, the firmer it will stand. A pyramid, for this reason, is the firmest of all structures.The base upon which the human body rests, or is…
Physics · Science · Technology
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