Some weights and measures derived from a pre-WW2 edition of Arthur Mee's Children's Encyclopaedia:
Note: the British Imperial bushel dates from the Weights & Measures Act 1824. It is slightly larger than American bushels, which are derived from the 15th century Winchester bushel, and are therefore more authentically medieval. I give both figures.
For those unfamiliar with the British Imperial system, a bushel is a measure of dry volume equivalent to eight gallons. It isn't quite the same in the American system (it's about 9.3 US gallons; unlike the Imperial system the US wet quart and dry quart are different).
The Imperial bushel equates to 36.37 litres, the American one to 35.24 litres. One pound (lb) is 454 grammes in both the US and British Imperial systems.
Code:
Imperial American
Item bushel bushel
Cherries[*] 72lb 70lb
Plums[*] 72lb 70lb
Pears[*] 72lb 70lb
Beans 66lb 64lb
Salt 65lb 63lb
Apples[*] 64lb 62lb
Gooseberries[*] 64lb 62lb
Lentils 63lb 61lb
Peas 63lb 61lb
Maize 60lb 58lb
Wheat 60lb 58lb
Onions 57lb 55lb
Currants 56lb 54lb
Potatoes 56lb 54lb
Barley 55lb 53lb
Rye 54lb 52lb
Raspberries[*] 48lb 47lb
Swedes 45lb 44lb
Turnips 45lb 44lb
Carrots 40lb 39lb
Parsnips 40lb 39lb
Oats 40lb 39lb
Green peas 32lb 31lb
[*] The Children's Encyclopaedia gives these weights in pecks (1/4 bushel). There is sometimes a discrepancy between weights given in pecks and weights given in bushels - it notes potatoes as 56lb/bushel and 14lb/peck, which is fine, but turnips as 12lb/peck and 45lb/bushel. Obviously some rounding off has been done somewhere, so where an option is given (potatoes, onions and turnips), I've favoured the weight per bushel.
The Children's Encyclopaedia is chock full of bits of information useless to all but obsessive roleplayers. So if you're an obsessive roleplayer, read on...
Strength of Ice
1.5 inches thick will support a man
4 inches will support a horseman
10 inches will support a crowd
18 inches will support a railway train
Weight of timber (lb/cubic foot)
(note: whether this is seasoned or unseasoned weight is not specified.)
Code:
Alder 33
Ash 46
Beech 46
Birch 40
Horse Chestnut 35
Spanish Chestnut 41
English Elm 43
Silver Fir 30
Hazel 39
Hornbeam 45
Larch 38
Lime 28
Maple 42
Oak 53
Scots Pine 32
Poplar 30
Norway Spruce 30
Sycamore 41
Willow 33
Hay & Straw Weight
36lb of straw is one truss
56lb of old hay is one truss
60lb of new hay is one truss
36 trusses is one load
Wool weight
7lb is one clove
14lb is one stone
182lb is one wey
364lb is one sack
4386lb is one last
20lb is one score
12 score is one pack
Velocity of water
3 ft/sec will move fine clay
6 ft/sec will move fine sand
8 ft/sec will move coarse sand
12 ft/sec will move gravel as large as one inch diameter
36 ft/sec will move stones as large as hens' eggs
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