The later nineteenth century connected coffee more closely with industrial production. Jabez Burns's 1864 roaster patent is a useful milestone: machinery that could discharge roasted coffee without moving the whole vessel away from the heat helped make commercial roasting more practical. Packaging and distribution then made pre-roasted coffee a more accessible retail product.
At the farm level, the period tells a different story. Coffee leaf rust was reported in cultivated coffee in Ceylon, now Sri Lanka, in 1869 and became a devastating problem. The episode demonstrates that increasing demand and investment could not remove the biological risks facing a crop. Agricultural history belongs beside the story of roasters and brands.
These two developments should be read together. A reliable supply of roasted coffee depends on both processing technology and viable farms, even when the final customer sees only the package. The period also cautions against treating a celebrated machine patent as the whole history of coffee: growers, workers, transport networks and plant disease shaped what the machinery could ultimately deliver.
The conversation
A good question can make a better brew.