Van Nostrand's eclectic engineering magazine (1869)
[New York : D. Van Nostrand] · leaf 587
ass contained within the outer falls to the ground unless it can be shown spherical superficies IKS and the interior that every particle composing the spherical spherical superficies P p, the mass compos- pyramid, is in perfect repose as regards the ing the sections near the base of the spheri-… … 81 16 inr repose : — Let H I K L be a spherical | Through P let there be drawn to this super- superficies and P a corpuscle placed within.* ficies the two lines H K, I L, intersecting ed, I do not mean superficies purely mathematical, but orb3 * Sir Isaac Newton in h>s demonstrations relating to…
Engineering
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