ArticleslgStudy

science

Load (unit)

Load (unit) is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Load (unit) rather than just read about it. In short: The load, also known as a fodder, fother, and charrus (Latin: carrus, lit. "cartload"), is a historic English unit of weight or mass of various amounts, depending on the era, the substance being measured, and where it was being measured. The term was in use by the 13th century, and disappeared with legislation from the 1820s onwards.

Key takeaways

  • Load (unit) belongs to science; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Load (unit) to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Load (unit) from memory before moving on to harder problems.

Reference excerpt

The load, also known as a fodder, fother, and charrus (Latin: carrus, lit. "cartload"), is a historic English unit of weight or mass of various amounts, depending on the era, the substance being measured, and where it was being measured. The term was in use by the 13th century, and disappeared with legislation from the 1820s onwards. Modern equivalents of historical weights and measures are often very difficult to determine, and figures given here should be treated with caution.

Etymology According to the Oxford English Dictionary, the word "fother" (noun) is derived from:

OE. fóðer (strong neuter n.) = OS. fôthar (MDu. voeder, Du. voer), OHG. fuodar (MHG. vuoder, Ger. fuder):–WGer. *fôÞr(o); the continental words mean ‘cartload’, ‘a certain weight supposed to represent a cartload’, ‘a certain measure of wine’ (see fooder, fudder). The root is usually believed to be an ablaut variant of faÞ- to stretch out: see fathom n. 1. A load; a cart-load (of hay, turf, wood, etc.). b. transf. A mass; a quantity, ‘lot’. c. Used for an enormous quantity, a ‘cart-load’ of gold or money. 2. spec. 'A definite weight of some specified substance.' a. Of lead: Now usually 19½ cwt. b. ellipt. in phrases: 'to fall' as a fother (of lead); hence, a crushing blow.

Lead load In very general terms, a "load" or "fother" of metallic lead was approximately or exactly equal to one long ton of 2240 lbs (1016 kg), also equal to approximately one tonne. Fothers have been recorded from 2184 lbs (991 kg) to 2520 lbs (1143 kg). According to the Tractatus de Ponderibus et Mensuris, a memorandum of Edward I (reigned 1272–1307), the load of metallic lead was 30 fotmals, 175 stone, or 2,100 Merchant pounds (approx. 1016 kg).

The Load of Lead doth consist of Thirty Fotmals, and every Fotmal containeth Six Stone, except Two Pound; and every Stone doth consist of Twelve Pound, and every Pound consisteth of the Weight of 25 Shillings, whereby the Sum in the Fotmal is Seventy Pound. But the Sum of the Stones in the Load is Eight Times Twenty and Fifteen, and it is proved by Six Times Thirty which is Nine Times Twenty. But of every Fotmal there are abated Two Pound in the foresaid Multiplication, which are Sixty, which make Five Stone. And so there are in the Load Eight Times Twenty and Fifteen as is aforesaid. In Derbyshire up to the 13th century a fother of lead is recorded of 1680 lbs or 15 long hundredweight (cwt.) (approx. 762 kg), and likewise in Devon a load of lead weighed the same. An Act of Parliament (12 Cha. 2. c. 4) (1660) stated that a fodder or fother of lead was one long ton, or 20 cwt. (1016 kg) Miners of lead ore in Yorkshire in the late 17th century used a fodder of 3,808 pounds (1,727 kg), on the assumption that the ore when smelted weighed about 65% less (about 2240 lbs or one long ton). Other measures were also used for lead ore, e.g. the volumetric "dish" used in the Low Peak district of Derbyshire was 14 pints (weighing 58 lbs, 26 kg), but in the High Peak it was 15 or 16 pints. Fothers were not used in all districts; for example in the Mendip Hills and in Burnley, Lancashire, tons, hundredweights and pounds were used in the first half of the 17th century. Vivant-Léon Moissenet, a French mineralogist who studied and wrote about English mining in the mid 19th-century stated that in Shropshire 200 lbs were added to each ton of concentrate at the smelt works to make a ton of 2,440 pounds (1,110 kg). By the early 19th century there was a vast multiplicity of local measurements of all types of goods, which a parliamentary report of 1820 made clear. For plumbers, and in London, a fodder was 19½ cwt (now about 990 kg), and with miners generally 22½ cwt (now about 1140 kg). In Derbyshire a "mill fodder" was 2820 lbs (1280 kg), but when shipped at Stockwith-on-Trent, 2408 lbs (now about 1092 kg). In Hull it was 2340 lbs (1060 kg). In Northumberland a fother of pig lead was 21 cwt. (1066 kg), and in Newcastle sometimes 22 cwt (now about 1120 kg). The fother was generally used by miners, shippers and smelters. When the metallic lead finally came to be sold it was weighed precisely; its value was calculated to the nearest pound weight and the price adjusted accordingly.

Straw load The load of hay or straw was 36 trusses or 1,296 pounds (now about 588 kg).

Wood load The American load of stacked firewood varied. A load of unhewn wood came to 1+2⁄3 cord-feet or 26+2⁄3 cubic feet (now about 0.75 m³), while a load of hewn wood came to 1+23⁄40 cord-feet or 43 cubic feet (now about 1.2 m³).

Wool load The load of wool was 12 wey or 108.13 sacks (now about 1372 kg).

Dung and lime In Northumberland in the 1820s, a fodder of dung or of lime was equal to a cartload pulled by two horses.

See also Imperial units US customary units Derbyshire lead mining history

References

Citations

Bibliography Cardarelli, François (2003), Encyclopaedia of Scientific Units, Weights, and Measures, London: Springer, ISBN 978-1-4471-1122-1 Commissioners on Weights and Measures (18 September 1820). Second Report of the Commissioners appointed by his Majesty to consider of subject of Weights and Measures (PDF). London: Ordered, by the House of Commons, to be printed. Gill, M.C.; Harvey, W.S. (1998). "Weights and Measures Used in the Lead Industry" (PDF). British Mining. 6 (61). Sheffield: Northern Mine Research Society.

Worked examples

Example 1 — a first encounter with Load (unit)

Start with the simplest possible case. Write down what Load (unit) claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Load (unit) before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Load (unit) ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Load (unit)

In research
Load (unit) appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Load (unit) in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Load (unit) is common in secondary-school and first-year university syllabi. It links to neighbouring topics Lead mining in the United Kingdom, Obsolete English units of measurement, so understanding it makes those chapters shorter.
In everyday life
Look for Load (unit) outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Load (unit) in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Load (unit) means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Load (unit) out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Load (unit) in simple terms?

The load, also known as a fodder, fother, and charrus (Latin: carrus, lit. "cartload"), is a historic English unit of weight or mass of various amounts, depending on the era, the substance being measured, and where it was being measured. The term was in use by the 13th century, and disappeared with…

Why does Load (unit) matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Load (unit)?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Load (unit).

Tags

  • Lead mining in the United Kingdom
  • Obsolete English units of measurement

Keep exploring