I found this “useful information” in the back of an exercise book. My co-worker says, this is like something straight out of “Rick and Morty” and not used by Americans. I pointed out that it says “useful information”.

Just to give you an idea:

20 grains (gr.) = 1 scruple

3 scruples = 1 dram

16 drams = 1 ounce (oz.)

24 grains (gr.) = 1 penny-weight (dwt)

2 barrels = 1 hogshead (had.)

8 quarts = 1 peck (pk.)

4 pecks = 1 bushel (bu.)

1 bu. potatoes = 60 lbs.

1 barrel flour = 196 lbs.

128 cubic feet = 1 cord of wood

24-3/4 cubic feet =1 perch of stone

2000 pounds = 1 ton (T.)

2240 pounds = 1 long ton (L.T.)