364 



GENERAL TOPICS. 



SPECIFIC GRAVITY OF VARIOUS SUBSTANCES.— 



Contimied. 



Oak, red, black, etc. 



" live, .88-1.02... 



Oils, olive, whale... 



Peat 



Petroleum 



Pin(i, white, perfectly dry, 35-.4S.. 



" vellow, Northern, .48 to .62.. 



" " Southern, .64-. 80. ... 

 Platinum, 21-22 



Quartz common, pure, 2.64-2.67. 

 Rosin 



Salt, coarse, per struck bu., Syracuse, N. Y., 56 lbs. 

 Sand of pure quartz, dry and loose, per struck bu. 



1 12-133 ^t>s 



Sand ot pure quartz, wet 



Silver — . 



Snow, fresh fallen 



" moistened and compacted by rain 



Soils, common loam, perfectly dry, loose 



Soils, common loam, perfectly dry, moderately 



rammed 



Soils, common loam, slightly moist, loose 



" " " as a soft, flowing mud 



Spruce, perfectly dry 



Sulphur 



Steel, 7.7-7.9...... 



Sycamore, perfectly dry 



Tar 



Tin, cast 



Walnut, perfectly dry 



Water, pure rain or distilled, at 32° F. (barometer 



30 in-) o 



Water, pure rain or distilled at 62° F. (barometer 



30 in.) " 



Water, pure rain or distilled water at 212** F. 



(barometer 30 in.) 



Water, sea, 1.026-1.030 



Wax, bees' 



Zinc, 6.8-7.2. 



Average 

 Specific 

 Gravity. 



.878 

 .40 

 •55 

 .72 



21-5 



2.65 



10.5 



•4 

 2.0 

 7-85 



•59 



7^35 

 .61 



.028 

 •97 



7.0 



Note.— Green timbers usually weigh from one fifth to nearly one hal! 

 more than dry and ordinary build iig timbers when tolerably seasoned; 

 about one sixth more than perfec.ly dry. 



