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HYDROSTATICS AND HYDRAULICS. 



TABLE OF SPECIFIC GRAVITIES. 



Metals. 



Gold, pure 19.36 



" standard 17.16 



Mercury 13.58 



Lead 11.35 



Silver 10.50 



Copper 8.82 



Stones and Earths. 



Brick 1.90 



Chalk 2.25 to 2.66 



Clay 1.93 



Coal, anthracite, about. . .1.53 



Coal, bituminous 1.27 



Charcoal 44 



Earth, loose, about 1.50 



Flint 2.58 



Granite, about 2.65 



Gypsum 1.87 to 2.1T 



Limestone 2.38 to 3.17 



Lime, quick 80 



Marble 2.56 to 2.69 



Peat 60 to 1.32 



Salt, common 2.13 



Sand 1.80 



Slate 2.67 



Woods — dry. 

 Green wood often loses one third of its weight by seasoning, and 

 sometimes more. The same kind varies in compactness with soil, 

 growth, exposure, and age of the trees. 



Apple 68 to .79 



Ash, white 72 to .84 



Beech 72 to .85 



Box 91 to 1.32 



Cherry 71 



Cork 24 



Elm 58 to .67 



Hickory 84 to 1.00 



Maple 65 to .75 



Pine, white 47 to .56 



Pine, yellow 55 to .66 



Oak, English 93 to 1.17 



" white 85 



" live 94 to 1.12 



Poplar, Lombardy .40 



Pear 66 



Plum 78 



Sassafras 48 



Walnut 67 



Willow 58 



