Roger Treffry of Beer Barton, near Plymouth, hath discovered the real cause, with the method of preventing, what is commonly called smutt-balls, coal-brands or blacks amongst wheat, barley and oats.

Bibliographic Details
Main Author: Treffry, Roger
Format: eBook
Language:English
Published: [England] : [publisher not identified], [1792]
Series:Making of the modern world (Goldsmiths'-Kress Library of Economic Literature)
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