Sentence:  The Stones (a Miracle to Mortal View, / But long Tradition makes it pass for true) / Did first the Rigour of their Kind expell, / And suppled into softness as they fell; / Then swell'd, and swelling, by degrees grew warm; / And took the Rudiments of human Form. / Imperfect Shapes: in Marble such are seen, / When the rude Chizzel does the Man begin; / While yet the roughness of the Stone remains, / Without the rising Muscles, and the Veins. / The <WSD>sappy</WSD> parts, and next resembling juice, / Were turn'd to moisture, for the Body's use: / Supplying humours, blood and nourishment; 
Meaning of the word marked with <WSD> tags:  Juicy.