\VI [GHTS AND MEASURES. 407 



SPECIFIC GRAVITY OF VARIOUS SUBSTANCES 



(Trautwinh.) 



Average 

 Weight ot 

 I cu. foot, 

 in Pounde. 



Aluminum 



Anthracite, i. 3-1. 84, usually 



" broken, of any size, loose 



(A ton, loose, averages from 40 to 43 cubic feet.) 

 Ash, American white, dry 



" " " perfectly dry 



Asphaltum, 1-1.8 



Boxwood, dry . 



Brass (copper and zinc) cast, 7. 8-8. 4 



Bronze (copper 8 parts, tin i part, gun metal), S.4- 

 8.6 



"Cement, English Portland 



Charcoal, of pines and oaks 



Cherry, perfectly dry 



Chesmut. perfectly dry 



Coal, bituminous 1,2-1.5 



broken, of any size, loose 



(.\ ton occupies from 43 to 48 cubic feet.) 



Copper, cast, 8.6-8.8 



Cork 



Coke, loose, of good coal 



(A ion occupies 80 to 97 c ubic feet.) 



Elm, perfectly dry 



Fat 



Glass, 2.5-3.45. 



Gold, cast, pure 



Gravel, about the same as sand, which see. 



Hemlock, perfectly dry 



Hickory, perfectly dry 



Ice, .917-.922 



India rubber 



Iron, casl, 6.9-7 4, •• • > 



Lard 



Lead ix.p8-ii. 7 



Lime.q ick 



' ground laose, ^er struck bu, 62-72 lbs.. 

 LimesK^ne ; nd marMes 



Mahoga..y, S anish, dry 



Maple, dry 



Mercury, at 60** F 



Oak, white, per£e..tl7 dry, .66-.88 



61 



752 



4 



96 



I 



5 



672 



66 



35 



.56 

 •93 



19.258 



■77 



162. 

 93-5 

 52-56 



38. 

 47- 

 83.3 



60. 



504- 



529- 



8i-io# 

 15 ',0 

 42. 

 41. 



84. 

 47-52 



J»2. 

 15 . 



23-3» 



35. 

 58. 



48 



