A TABLE 



THE SPECIFIC GRAVITIES OF DIFFERENT BODIES. 



In consulting this Table of Specific Gravities, it must be borne in mind that 

 water is taken as the unit of measure for solids and liquids ; and atmospheric air 

 as the unit of measure for the different gases. Water at the common temperature 

 is 1,000, and mercury 13.568 ; whence we conclude that mercury is 13 times 

 heavier than water. We mean that a cubic foot of water weighs 1000 ounces ; 

 therefore a foot of mercury weighs 1 3,568 ounces, and a cubic foot of bar iron 

 7788 ounces; a cubic foot of vermilion 4230, of Portland stone 2496, of indigo 

 0,769, and of cork 0,240 ounces. 



METALS. 



Antimony, crude ' ^ .. .- .,. 4064 



glass of . ,-.:-. 4946 



molten . . . 6702 



Arsenic, glass of, natural . . 3594 



molten vi>?;i;i , 5763 



native orpiment . . 5452 



Bismuth, molten ... 9823 



native . . . 9020 



ore of, in plumes . 437 1 



Brass, cast, not hammered . 8396 



ditto, wire-drawn . . 8544 



cast, common . . 7824 



Cobalt, molten . . . 7812 



blue, glass of ,.,^ ,' . 2441 



Copper, not hammered . . 7788 



the same wire-drawn . 8878 



ore of soft copper, or 



natural verdigris &ggjy. 3572 

 Gold, pure, of 24 carats, melted, 



but not hammered . . 19258 



the same hammered . . 19362 



Parisian Standard, 22 car. 



not hammered . 17486 

 VOL. I. 



Gold, hammered . ,,/';./! 17589 



guineaofGeo.il. . . 17150 



guinea of Geo. III. . .17629 



Spanish gold coin . . 17655 



Holland ducats . . 19352 



trinket standard, 20 carats 



not hammered . . 15709 



the same hammered . . 15775 



Iron, cast ;[,';,!;:, 7207 



cast at Carron . ' , . 7248 



ditto at Rotherham . .7157 



bar, either hardened or not 7788 



Steel, neither tempered nor hard- 

 ened .... 7833 



hardened,butnot tempered 7840 



tempered and hardened . 7818 



. ditto, not hardened . . 7816 



Iron, ore prismatic . . . 7355 



ditto specular . . . 5218 



ditto, lenticular . . .5012 



Lead, molten .... 11352 



ore of, cubic . . . 7587 



ditto horned . . . 6072 



ore of black lead v . 6745 



2 H 



