The farmer's harvest companion, [electronic resource] : and country gentleman's assistant; containing exact and useful tables ready cast up; shewing at one view, the area or content of any piece of land; the expence of workmanship of any quantity; and the value of any number of perches per acre Being a necessary guide for gentlemen's stewards, land measurers, buyers and sellers of wood; and particularly useful for farmers in the time of harvest, and other persons who put out work, by the acre. By Thomas Jarvis. The fifth edition, carefully corrected and enlarged. With sundry new tables, by an experienced farmer, in the county of Kent. Shewing The Expence of Threshing; the Value of Workmanship by the Hundred; the sowing Corn in Drills or Furrows, and ascertaining the Quantity of Seed per Acre.