408 



GENERAL TOPICS. 



BPKCIFIC GRAVITY OF VARIOUS SUBSTANCES.— 



Continued. 



Oak, red, black, etc. 



" live, .88-1.02. .. 



Oils, olive, whale... 



Peat 



Petroleum 



Pint:, white, perfectly dry, 35-.45. 



" 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. 



112-133 lbs 



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 d stilled, at 32" F. (barometer 



30 in.) 



Water, pure rain or 'i tilled at 62° F. (barometer 



30 in.) 



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



(barometer 30 in.) 



Water, sea, i. 026-1.030 



Wax, bees' 



Zinc, 6.8-7.2. 



Averatre Average 

 Soedl: W^'g^ht°f 



Gravilv ^ ^"- ^«°t» 

 v^ravity. -^^ pound*. 



31 



878 

 40 



55 

 72 



5 



a. 6^ 

 1. 1 



10.5 



•4 

 2.0 

 7.85 



•59 



i.o 



7-35 



.61 



\.ort 

 •97 



7.0 



32-45 



59-3 

 57-3 



20-30 

 54.8 



25- 



34-3 

 45 • 

 i342^ 



68.6 



45- 



90-106 

 118-H9 



655. 

 5-12 

 15-20 

 72-80 



90-100 



70-76 



104-113 



25- 

 125. 

 490. 



37^ 



62.4 

 459^ 



38^ 



62.417 



62.35$ 



59 7 



64.08 

 60.5 



437^5 



NoTH.— Green timbers usually weigh from one fifth to nearly one hall 

 more than dry and ordinary buic; ;g timbers when tolerably seasoned; 

 about one sixth more than perfec ly dry. 



