18th Century Threshing

The Threshing Process

How to Thresh

Review of Farm Tools through the Ages by Michael Partridge

The techniques of farming

We can be grateful for author, Michael Partridge's early interest in the techniques of farming, for it has led to a most readable and informative book.

'Farm Tools Through the Ages' does exactly what its name indicates it takes a look at implements used by farmers down through the ages.

The book is arranged under 10 headings; land drainage, cultivating the soil, steam cultivation, sowing and planting, harvesting crops, ...

Threshing

Threshing or thrashing, separation of grain from the stalk on which it grows and from the chaff or pod that covers it.

The first known method was by striking the reaped ears of grain with a flail. In another early method horses or oxen trod out the grain from stalks spread on a threshing floor.

In both cases the straw was raked away and then the mixture of grain and chaff was winnowed, i.e., tossed into or poured through a current of air so that the light chaff was blown away from the heavier grain.

In 1784 a Scotsman, Andrew Meikle, devised a threshing machine.

Sheaves of grain were fed into a revolving cylinder armed with wooden beaters. Another toothed drum raked away the loose straw and pushed the remaining chaff and grain through a sieve onto a series of rollers that further separated the chaff from the grain in preparation for winnowing.

The principle of Meikle's machine has been retained in all threshing machines up to and including the modern self-propelled combines .

Bibliography: See M. Partridge, Farm Tools through the Ages (1973).

"threshing." The Columbia Encyclopedia, Sixth Edition. 2008. Encyclopedia.com. (August 31, 2009). http://www.encyclopedia.com/doc/1E1-threshin.html
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