Most of the tables and estimates that the farmer needs in his "figuring " will be found in this chapter ; but greenhouse computations will be found in Chapter XI, silos and other construction in Chapter XXV, and board measure and log measure in Chapter XII.

Tables of Regular American Weights and Measures

Avoirdupois or commercial weight

271/3 1/2 grains...............=1 dram.

16    drams...............= 1 ounce.

16    ounces...............=1 pound.

25    pounds...............=1 quarter.

4    quarters, or 100 pounds.........=1 hundredweight.

20    hundredweight, or 2000 lb.........=1 ton.

480    pounds...............=1 imperial quarter.

100    pounds is also called..........1 cental.

2240   pounds...............=1 long ton.

Troy or jewelers weight

24 grains ................=1 pennyweight.

20 pennyweights ..............=1 ounce.

12 ounces................=1 pound.

Apothecaries' weight

20 grains................  =1 scruple.

3 scruples................  =1 dram.

8 drams................  =1 ounce.

12 ounces................  =1 pound.

Table of comparative weights

Dry measure

2 pints.................=1 quart.

8 quarts................=1 peck.

4 pecks.................=1 bushel.

8 bushels (480 pounds)...........=1 quarter.

36 bu................ . . = 1 chaldron.

Liquid measure

4 gills................=1 pint.

2 pints................=1 quart.

4 quarts...............=1 gallon.

311/2 gallons...............=1 barrel.

2 barrels, or 63 gallons...........=1 hogshead.

Apothecaries fluid measure

60 minims................=1 fluid dram.

8 fluid drams...............=1 fluid ounce.

16 fluid ounces..............=1 pint.

8 pints .................=1 gallon.

1 minim equals 1 drop of water.

Line or linear measure

12 inches...............=1 foot.

3 feet.....,..........=1 yard.

51/2 yards, or 161/2 feet...........=1 rod or pole.

40 rods................= 1 furlong.

8 furlongs (320 rods)...........= 1 mile (statute mile).

3 miles................=1 league.

Surveyors' or chain measure

7.92 inches...............  =1 link.

25 links................  =1 rod or pole.

4 rods, or 66 feet............  =1 chain.

80 chains...............  =1 mile.

Square or surface measure

144 square inches.............=1 square foot.

9 square feet..............=1 square yard.

301/4 square yards.............= 1 sq. rod or perch.

160 square rods.............=1 acre.

640 acres ...............= 1 sq. mile or section.

Surveyors' square measure

625 square links . ........... .= 1 square rod or pole.

16 poles...... ........= 1 square chain.

10 square chains.............=1 acre.

640 acres ................= 1 sq. mile or section.

36 square miles (6 miles square)........=1 township.

Solid or cubic measure

1728 cubic inches.............  =1 cubic foot.

27 cubic feet..............  =1 cubic yard.

16 cubic feet..............  =1 cord foot.

8 cord feet, or 128 cubic feet........  =1 cord of wood.

243/4 cubic feet..............  =1 perch.