A system of natural philosophy, designed for the use of schools and academies (1845)
Moffat, J[ohn] M. [from old catalog] · Philadelphia, E. C. Biddle · leaf 72
me-morate the great fire in 1666, and the elevated spire of SalisburyCathedral, have both become slightly inclined, but they will pro-bably long remain to afford standing evidence of the consummateskill of their respective founders. Travellers have frequently no-How do vibrating figures exemplify… … 70 MECHANICS. ticed the leaning-towers of Bologna and Pisa, especially the latterwhich is one hundred and thirty feet high, and inclines so muchthat the summit overhangs the base fifteen or sixteen feet; yetthe line of direction from the centre of gravity dropping withinthe base, the structure has…
Physics
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