6134. Weight of Earth, Rocks, etc.

6134. Weight of Earth, Rocks, etc.. A cubic yard of sand or ground weighs about

30 cwt. Mud, 25 cwt. Marl, 26 cwt. Clay,

31 cwt. Chalk, 36 cwt. Sandstone, 39 cwt. Shale, 40 cwt. Quartz, 41 cwt. Granite, 42 cwt. Trap, 42 cwt. Slate, 43 cwt.

To find the weight of a cubic foot of any of the above, divide the weight of a cubic yard by 27. Thus, a cubic foot of sand weighs 30/27, or 11/9 cwt., equivalent to about 124 pounds. 6135. Weight of Various Minerals. One cubic foot of water weighs at a temperature of 60° Fahrenheit, 621/2 pounds avoirdupois. By ascertaining the specific gravity of a substance and multiplying with 62i pounds, the exact weight of one cubic foot is obtained.

Pounds

Avoirdupois.

Cubic foot

Sp. Gr.   Weighs.

Anthracite coal...............      1.5        94

Antimonial copper, tetrahedrite, or grey copper..............     5.0       300

Antimonial silver..............     9.5       600

Antimony ore, grey sulphuret..      4.5       279

Antimony metal..............     6.5       400

Apatite, or phosphate of lime..     3.0       186 Arsenical iron pyrites, mispickel.......................     6.0       370

Asbestos.....................      3.0       186

Asphaltum, mineral pitch......      1.0        62

Baryta sulphate...............      4.5       310

Baryta carbonate, witherhite...     4.0       248

Bismuth......................      9.7       600

Bituminous coal..............      1.5        90

Black lead, graphite...........     2.0       125

Black jack blende, sulphuret of zinc........................     4.0       250

Bog iron ore..................     4.0       250

Brown haematite..............     4.0       250

Building stones, comprising granite, gneiss, syenite, etc....      3.0       186

Calamine.....................     3.3       190

Chromic iron.................     4.5       260

Copper pyrites................     4.0       260

Derbyshire spar, fluor spar.....     3.0       186

Feldspar......................      3.0       190

Flint ........................     2.5       110

Loose sand...................      —        95

Franklinite...................     5.0       310

Galena.......................     7.5       465

Gold (20 carats)..............  15.7      1000

" (pure)...................  19.2 to l200

Gypsum......................      2.3       130

Iron - cast iron...............       —       450

" magnetic ore............     5.0       310

" spathic ore.............     3.0       200

" " pyrites..........     5.0       310

" pyrrhotine, or magnetic pyrites.................. 4.5       280

" specular ore............     4.5       290

" wrought................       —       487

Limestone, hydraulic..........     2.7       150

" magnesian.........      2.5       130

Manganese, binoxide of........     4.8       294

Malachite.....................     4.0       248

Mica.........................      2.8       160

Novaculite, or whetstone......      3.0       186

Ochre...................-•___     3.5       217

Platinum, metal and ores......  16 to 19 1116

Porcelain clay...............      2.0       14C

Pyrites,iron..................      4.5        280

Quartz, pure, compact.........      2.6        155

" loose, angular, and round sand.................       —        100

Trap.....................____       3.0        186

Vitreous copper, copper glance.      5.5        341

Wood tin, stream tin..........      7.0       434

Zinc, sulphide or blende.......      4.0        250

Zincite, red zinc ore...........      5.5       331

Zinc carbonate................      4.4       26S

Zinc silicate..................      3.4        20C

(Feuchtwanger).

6136. Table of the Relative Hardness and Weight of the Principal Precious

Stones, etc..

. .                                Hard-   Specific

Substances.                        ness.  Gravity.

Diamond from Ormus.......20       3.7

(pink).............19       3.4

(bluish)...........19       3.3

" (yellowish)........19       3.3

" (cubic).............18    . 3.2

Ruby.......................17       4.2

" (pale, from Brazil).....16       3.5

Sapphire...................16       3.8

Topaz......................15       4.2

" (whitish)..............14       3.5

" (Bohemian)............11       2.8

Ruby (spinelle).............13       3.4

Emerald....................12       2.8

Garnet.....................12       4.4

Agate.....................12       2.6

Onyx.......................12       2.6

Sardonyx...................12       2.6

Amethyst (occidental).......11       2.7

Crystal......................11       2.6

Cornelian___...............11       2.7

Jasper (green)___..........11       2.7

" (reddish yellow)......9       2.6

Schoerl....................10       3.6

Tourmaline.................10       3.0

Quartz......................10       2.7

Opal.......................10       2.6

Chrysolite..................10       3.7

Zeolite..................... 8       2.1

Fluor......................7       3.5

Calcareous spar.............6       2.7

Gypsum....................5       2.3

Chalk......................3       2.7

" (plate)................          2.5:2.6

" (crystal or flint).......           3.0:3.616