Ghost Acreage

London's coal came down the coast, but its journey began and ended on land. It had to reach the loading place on the Tyne and, after the sea passage, move from the Thames to its users. Horses still did part of the hauling. The city was obtaining fuel from a geological stock through a supply system that had not ceased to need fodder.¹ An economy can escape a particular demand on its land while continuing to make others. The question is how much room the change gives it, and what it can do with that room.

Long before the steam engine, fuel carried by a sailing ship did not consume pasture for every mile of its passage. A longer route across water could therefore be cheaper than a shorter route overland. The map of supply was not a set of circles drawn at increasing distances from London. Routes made some distant resources available while leaving nearer ones expensive to obtain. A coal seam was an endowment in the ground; the fuel offered to a buyer was the result of getting to it and getting it somewhere else.

Adam Smith's account of water carriage includes the upkeep of the people and animals doing the carrying. In his comparison between London and Edinburgh, the expense of wagons is partly the expense of maintaining horses, even before their wear and the wear of the wagons are counted. His ship needs a crew and must itself be maintained, and he charges the sea passage with its greater risk. The cheaper route is not costless or safe by definition. It permits goods to bear the cost of reaching a market which, carried another way, they could not afford to reach.²

There is an unshowy kind of invention in that last possibility. A material need not become more powerful for its economic reach to increase. Much can change because it is now worth moving. The work of improvement includes creating a route over which an ordinary article can travel repeatedly at an ordinary price. A single delivery proves less than this. A city that begins to depend on the deliveries has enlarged its possibilities on the expectation that they will continue.

A forest on paper

E. A. Wrigley asks us to place a forest beside the coal trade. It is a forest in a calculation, grown to supply the heat that would otherwise have come from coal. Using his estimate of English coal output around 1700, approximately 2.2 million tons, and his rounded equivalence of two tons of dry wood to one ton of coal, the comparison requires about 4.4 million tons of wood each year. If an acre supplies two tons annually on a sustained basis, the corresponding woodland occupies 2.2 million acres.³ This is an assumption about recurring production, not a report that England saved that many acres from the axe. Nor does equal heat content guarantee equal performance in a hearth or furnace. The calculation makes visible a demand that would have to be met if wood were to replace the specified flow of fuel.

What is remarkable about the imagined forest is less its area than its recurrence. It has to be there again for the next year's fuel. One can fell more than grows back for a time, but then the supply is coming partly from a stock being reduced. Maintaining the harvest requires ground on which the next harvest can grow, while other claims continue to press upon that ground. A forest useful for fuel is also a place that might be wanted for another purpose. The calculation turns an apparently solitary requirement—more heat—into a relation among competing uses of land.

The organic economy was full of such relations. More animals could spare human exertion and improve transport, but feeding them made its own claim on production. More food, fibre, timber and fuel could be obtained through better cultivation and wider exchange; wind and water could supply work without being fed. Wrigley's distinction does not require us to imagine a world incapable of improvement. It concerns a growth that repeatedly encounters the need to obtain more from the living surface. Success in one activity can increase the demands that make another difficult.

Coal changed this relation. A growing demand for heat could be met by extracting more of an accumulated stock rather than assigning a corresponding area to recurring plant growth. The extraction spent a geological accumulation; it did not acquire a way to renew what was burned. What changed was the rate at which fuel could be obtained without waiting for the next growth of its source. The gain was substantial precisely because the other uses of the land continued to matter. There was no need for food or timber to become unimportant before fuel could release some of their competition. Nor was every acre once notionally assigned to fuel available for whatever the beneficiary wished to do next. The forest in the calculation had never possessed a title, a tenant or a crop. Actual land had all these complications. The comparison identifies room in a material account; it does not distribute the room among people.

There is also a difference between a recurring harvest and a recurring delivery. Coal did not have to regrow, but it did have to keep arriving. Its release from the growing season was accompanied by dependence on extraction and conveyance. Those activities could themselves be improved. Wrigley observes that a mine concentrated a large output at a point, whereas collecting the products of the soil required routes spread across their area of production. A heavily used connection could justify an investment that scattered traffic would not.⁴ What looked at first like the liberation of heat from acreage was also a change in the geography of worthwhile investment.

An improvement in carriage could lower the delivered price, making further uses profitable and giving the route more traffic. It could also leave a particular destination too expensive to serve. The geological stock did not answer either question. Once provision becomes an undertaking, its cost and reach develop through decisions about where to build and whom to supply. There is no reason to expect the resulting geography to reproduce the distribution of need.

What the fire would touch

Even at its destination, the fuel had not finished becoming useful. Coal brought smoke and impurities as well as heat. Allen's account of London's fuel transition makes the price difference an inducement to redesign uses which had preferred wood. A cheaper source of heat could be worth learning to burn; it did not become suitable merely by being cheaper.⁵

Under a metal vat, the fuel and its combustion products can be kept apart from the contents. Where the process brings them into contact, changing fuel can change the product. Wrigley uses this difference to explain why substitution presented very different difficulties across industries.⁶ The object wanted by the buyer was not an abstract quantity of heat. It was a satisfactory result from the operation. A fuel-equivalence calculation cannot tell the buyer how much alteration will be needed to obtain it.

This is a reason to take the calculation seriously enough to follow it beyond itself. The prospect of a saving gives the work of adaptation an object. It may justify experiments which would be pointless at a different fuel price, and it can make a troublesome material worth persisting with. The difficulty belongs inside the history of the advance. It is where an available resource begins to become a new practice.

Not all those practices were waiting for factories. Cooking and keeping rooms warm were substantial uses of coal. Wrigley finds a less comfortable use in Defoe's Colonel Jack: the boy shelters at a glass-house, taking warmth from work being done for another purpose. Defoe's novel makes this a place to live before it makes it a symbol of anything. The ashes and the warmth belong together; the boy has neither a room to heat nor a bed in which to enjoy the improvement.⁷

I find his later difficulty more interesting than an uncomplicated picture of cheap warmth. When he has money, he is afraid to return to his former sleeping place because the other boys may rob him. The comfort has not disappeared, but he can no longer use it in the same way. Defoe's adults draw a moral about the cares of possession. The boy's difficulty is more particular: having something worth keeping has made a familiar refuge dangerous. His immediate anxiety eases when one of the men agrees to keep the money and give him a written claim which no thief can collect. The fuel has not changed. The boy has acquired somewhere to put what made his old shelter frightening. None of this is a measure of London's living standards; it is the novel's less obedient account of what an improvement can involve.

Coal had uses quite apart from turning a shaft, and a history told backward from the steam engine can make them seem like preparations for the main event. They were already purposes. Their expansion could support further provision before a satisfactory means of converting heat into motion became widely available. The technical history therefore has several tempos. Finding a fuel suitable for an existing heat process and making an engine dependable enough for another kind of work are different achievements, even when both draw from the same seam.

Paying to find a use

Allen gives this difference an economic consequence. His explanation concerns the price relationships under which people would adopt a technique and undertake the expense of developing it. High wages relative to fuel and equipment costs could make labour-saving, energy-using methods attractive. But his argument also requires engineering capacities and knowledge through which the attraction could be pursued. The prospect of a profitable invention is not the invention.⁸

Mine drainage brings the two together. As workings went deeper, keeping water out could decide whether coal remained accessible at all. An engine required to pump that water could consume fuel supplied at the mine, including material for which there was little prospect of a sale. Allen follows this practical setting in his account of early steam power; Wrigley treats drainage technology as part of what determined the size of accessible reserves.⁹ The coal was helping to obtain more coal, through machinery that had to be developed and kept working. A resource that might appear on a geological map had acquired another boundary, one that engineering could move.

The two inquiries are connected in a way that a catalogue of necessary conditions conceals. If a technique saves one input by using more of another, its advantage changes with the prices confronting its user. Further improvements can then alter the range of circumstances in which it pays. What was once sensible close to a cheap supply can become sensible farther away; what originally justified its development need not remain the condition of every later adoption. The history can spread because the practice changes, as well as because another place acquires access to a similar stock.

Wrigley asks what sustained expansion demanded of an economy's energy base. Allen asks why particular alterations became worth attempting and adopting. Neither question can stand in for the other. There is a large difference between showing that a proposed scale of production could not be supplied from a given biological flow and explaining why a new way of producing was developed at a particular time. Yet the difference gives the combined inquiry its force. The material possibility becomes an undertaking when someone finds a use worth the expense of developing.

This account leaves room for a wasteful machine to matter. If its fuel is sufficiently cheap at the place where its work is needed, poor conversion efficiency may not prevent useful operation. Improving the conversion can subsequently extend its reach. Engineering efficiency and economic advantage remain distinguishable, as they were at the Centennial, but now the distinction helps explain a sequence of development rather than merely compare two measurements. A practice can acquire a future through a local accommodation that would be a poor arrangement elsewhere.

It would be a peculiar history of ingenuity that counted only the final, more economical machine. The expensive adaptations and limited early uses belong to the production of that possibility. So do the failures which gave no one a reason to continue. A later success does not make each earlier expenditure wise.

Land at the other end

In a footnote to his woodland comparison, Wrigley turns to another kind of ghost acreage: land outside the state supplying things its economy requires. Here the image changes its object. The acres are no longer only an imaginary forest that would replace coal. There are actual places producing imported goods, and a further calculation of the domestic production those goods displace.

Pomeranz follows this relation through sugar and cotton. He asks what would have been required to replace their contribution within Britain, including the different land and labour demands of alternative fibres. The imports did more than make an existing consumption cheaper. In his account, they helped industrial expansion proceed without drawing still more people into intensive production of the organic materials it continued to require. His argument also follows the plantation arrangements through which much of that supply was produced by enslaved people.¹⁰

The distinction matters to the word escape. A coal-equivalent forest need never be planted. Cotton supplied from another shore must still be grown, and the organization of that work is part of the history of its availability. A buyer may encounter both as relief from a domestic cost. The similarity in the buyer's account does not make the means of obtaining them equivalent. Coercion is not an additional moral item to be appended after provision has been explained when coercion helped organize the provision itself.

This does not make the gain from coal fictitious. A furnace supplied from a mineral stock and a mill supplied with imported fibre can enlarge one another's possibilities. The new production may require less domestic acreage while drawing more material through distant places. There is no single piece of land whose liberation measures the whole change, and no necessity that an equal burden has simply been passed elsewhere. What must be followed is the particular demand: which work was avoided, which work expanded, and through what arrangements the required product became available.

An economy can become less dependent on the yield of its own land while its inhabitants become more dependent on provision they do not control. An enlarged productive capacity does not distribute independence as it spreads. The cost of obtaining a necessary service may fall while the power to withhold it remains concentrated; a new route may also give its users an alternative they did not have before. The historical achievement lies in the possibilities made practicable. The political question begins in the arrangements by which they are kept within reach.

The coal has reached the Thames. Whether it reaches a particular hearth or furnace now depends on terms that no woodland-equivalence calculation can supply. The land no longer needed to grow that fuel was never a common estate awaiting division. What people acquired was a way of obtaining the heat—and positions from which to sell it, carry it, use it or be unable to afford it.

Source notes

Footnotes

1. E. A. Wrigley, Energy and the English Industrial Revolution (Cambridge University Press, 2010), pp. 39–40, inspected in the university-hosted PDF. The passage identifies the Tyne–Thames supply route and land carriage at its ends. The opening is a description of that arrangement, not a reconstructed individual voyage. Wrigley's illustrative estimate of a wood-burning London's requirements uses an analogy with Odense; neither its cartload count nor its acreage is presented here as observed London data. The implications for a supply map and expectations of continued delivery are this chapter's reasoning. ↩

2. Adam Smith, An Inquiry into the Nature and Causes of the Wealth of Nations (1776), Book I, chapter III, “That the Division of Labour is Limited by the Extent of the Market,” inspected in Project Gutenberg eBook 3300. The passage beginning “A broad-wheeled waggon” compares land carriage between London and Edinburgh with shipping between London and Leith; it includes maintenance, wear and the difference in risk or insurance. No transport ratio is borrowed as a measurement of the Tyne coal trade. Smith's argument about the extent of the market already establishes the economic importance of routes. The present synthesis follows its relation to recurring land demands and usable provision; it claims no discovery of transport costs or specialization. ↩

3. Wrigley, pp. 16, 37–39. Table 2.1 gives English output of 2.2 million tons in the 1700–9 column; its note says the early production figures concern an individual year or years, not the full decade. P. 39 calls the estimate 1700. The calculation uses England alone. Wrigley gives a sustained annual yield of 1–2 tons of dry wood per acre and rounds the fuel heat-content equivalence to two tons of dry wood per ton of coal. At the upper yield, 2.2 million × 2 ÷ 2 gives 2.2 million acres; at the lower yield it doubles. These are assumptions for an annual fuel-equivalence comparison, not a new forestry estimate. The heat values in his note, 4,200 and 8,000 kcal/kg, make the two-to-one ratio approximate. Losses in carriage, differences in end-use efficiency and domestic consumption versus output are not measured by this calculation. His underlying sources include Hatcher's coal-output estimate and White and Plaskett on wood heat content and yields; those works were not separately inspected. The later three-date calculation on p. 99 has inconsistencies of territorial description and figures against Table 2.1 and is not used. The earlier manuscript's “second England” claim remains withdrawn. ↩

4. Wrigley, pp. 42–44 and 103–104, on concentrated mineral production, the distribution of biological production and the incentive for transport investment. His generalizations about the uneconomic character of organic-economy roads are not adopted as universal. No canal return, haulage ratio, ten-mile price rule or claim about the profitability of a particular investment is made. The possible interaction of price, use and traffic in the following paragraph is economic reasoning, not an independently estimated historical feedback coefficient. ↩

5. Robert C. Allen, “The British Industrial Revolution in Global Perspective,” Keynes Lecture delivered 29 October 2009, Proceedings of the British Academy 167, pp. 199–224, especially pp. 207–210, Academy PDF, DOI 10.5871/bacad/9780197264775.003.0007. The inspected PDF carries a 2010 copyright; the publisher records the volume's publication in 2011. Allen's 2009 book develops the argument at greater length, but the chapter locators here belong to the inspected lecture. His account links rising relative wood-fuel prices with redesign to use coal and acknowledges sulphur, smell and contamination. No newly verified wage comparison, exact price ratio or universal adoption result is claimed. ↩

6. Wrigley, pp. 41 and 99–100, distinguishes heat processes separated from their fuel by a barrier from operations in which contamination complicates substitution, and distinguishes the earlier thermal transition from the development and spread of mechanical power. This chapter makes no assertion that a barrier guarantees product quality or that combustion heat can be substituted without changes in control. No single efficiency figure or date stands for the whole transition. ↩

7. Daniel Defoe, The History and Remarkable Life of the Truly Honourable Colonel Jacque, Commonly Called Colonel Jack (1722), opening narrative, inspected in Project Gutenberg eBook 52603. Its transcription reproduces a later illustrated edition. The glass-house shelter appears early; the dialogue beginning “And what dost thou do for a lodging at night?” and subsequent discussion supply the fear of losing money and of returning to the shelter. Wrigley cites the novel on p. 40, but the development here follows the inspected novel itself. No original-edition page locator is claimed. The subsequent safekeeping offer and written claim are in the same episode; the boy reports that his anxiety ends once the money is secured. The character's circumstances are fiction, and the reading of the change in his access to a refuge is interpretation, not a historical welfare finding. ↩

8. Allen, lecture, pp. 199–203, 207–210 and 212–218: demand for technology, the supply of knowledge and engineering, and improvements that change the range of profitable adoption. The chapter grants his substantive economic explanation without endorsing its full account of comparative wages, institutions or all industrial diffusion. The wasteful-machine discussion is a conditional explanation of local usefulness, not an invented installation or a numerical assessment of an early engine. This chapter offers a synthesis of resource history, transport and induced invention; it does not claim a new theory of technical change. ↩

9. Wrigley, pp. 44–45, on drainage and accessible coal; Allen, lecture, pp. 217–218, on mine pumping and his quotation from John Theophilus Desaguliers, A Course of Experimental Philosophy (1744), vol. II, pp. 464–465, concerning otherwise unsaleable coal. Desaguliers is encountered through Allen, not claimed as independently inspected. No universal account of early-engine profitability or fuel quality is inferred. The passage distinguishes the geological presence of coal from what an operating arrangement can reach; it does not claim self-producing machinery, unlimited expansion or a newly measured reserve increase. ↩

10. Kenneth Pomeranz, The Great Divergence: China, Europe, and the Making of the Modern World Economy (Princeton University Press, 2000), pp. 263–267 and 274–276; chapter DOI 10.1515/9781400823499-009. Inspected in a text reproduction displaying the 2000 edition and its page markers, with relevant excerpts pinned in the research record. Wrigley p. 39 n. 38 directs attention to p. 264. Pomeranz's discussion treats plantation organization and compulsory labour as part of the explanation of export provision, then compares the domestic requirements of substitutes for imported sugar and cotton. No numerical acreage, caloric estimate or general equivalence between cotton and wool is adopted. Neither this chapter nor its reading of Pomeranz treats all trade as coercive, all gains as displaced losses, or plantation slavery as a universal prerequisite of industrial production. The final political interpretation concerns distinctions already present in the documented forms of provision; it is not a new estimate of their respective causal shares. ↩