A TABLE of the Specifick Gravities of several Solid and Fluid Bodies.
Fine Gold 19,640 Calculus Humanus 1,700 Standard Gold 18,888 Oyl of Vitriol 1,700 Quicksilver 14,000 Oyl of Tartar 1,550 Lead 11,325 Bezoar 1,500 Fine Silver 11,091 Honey 1,450 Standard Silver 10,535 Gum Arabick 1,375 Bismuth 9,700 Spirit of Nitre 1,315 Copper 9,000 Aqua Fortis 1,300 Cast Brass 8,000 Serum of Human Blood 1,190 Steel } Soft 7,738 Pitch 1,150 the same } Hard 7,704 Spirit of Salt 1,130 Piece } Spring Temper 7,809 Spirit of Urine 1,120 Iron 7,645 Human Blood 1,040 Tin 7,320 Amber 1,040 Glass of Antimony 5,280 Milk 1,030 A Pseudo Topaz 4,270 Urine 1,030 A Diamond 3,400 Dry Box-Wood 1,030 Clear Crystal Glass 3,150 Sea-Water 1,030 Iceland Crystal 2,720 Common Water 1,000 Fine Marble 2,700 Camphire 0,996 Rock Crystal 2,650 Bees-Wax 0,955 Common Green Glass 2,620 Lynseed Oyl 0,932 Stone of a mean Gravity 2,500 Dry Oak 0,925 Sal Gemmæ 2,143 Oyl Olive 0,913 Brick 2,000 Spirit of Turpentine 0,874 Nitre 1,900 Rectified Spirit of Wine 0,866 Alabaster 1,875 Dry Ash 0,800 Dry Ivory 1,825 Dry Maple 0,755 Brimstone 1,800 Dry Elm 0,600 _Dantzick_ Vitriol 1,715 Dry Firr 0,550 Allom 1,714 Cork 0,240 Borax 1,714 Air 0,001 ¼
Figure 1. Are several Torricellian Tubes or Barometers of different Shapes, Bores, and Positions; but where the perpendicular Altitude of the Quicksilver in the Tubes, above the Level of the Surface of that in the Bason, is ever the same, or between 28 and 31 inches high; which is the known Counterpoise between 32 and 36 Feet of Water; and to the entire Atmosphere in its several States and Elevations, where the Bases or the several Tubes are supposed equal.
_Fig. 2._ Is a Diagonal Barometer, where the Alteration of the Perpendicular Altitude of 3 Inches, by the Obliquity of that Part B C of the Tube A B C, (as a Diagonal is oblique to the Sides of its Parallelogram,) is increas'd to 20 or 30 Inches Sideways, for more Nicety of Observation.
_Fig. 3._ Is a Wheel Barometer, where by two Weights G and H on a Pulley, by which a Hand is turned, the one of which plays freely in the Air, and the other rises and falls with the Quicksilver in the Tube, the Divisions are larger and more obvious than in the ordinary Barometer: as they are in the Diagonal one; for the like greater Nicety of Observation.