Report of the Commissioner of Patents for the year .. (1849)
United States. Patent Office · Washington : Office of Printers to House of Reps. · leaf 211
opted in our Middle and Southern States : They dig a pit from 1 to 3 feet deep, 3 feet wide, and of any required length. The tubers are heaped up in it in the form of a ridge or the roof of a house, covered with straw and afterwards with earth to a depth of 1 or 2 feet, well beaten down with the… … For the purpose of allowing the escape of heated gases or air, open- ings are made along the top of the ridge and twro hollow tiles inserted, extending down among the tubers, with a third tile placed over the top to prevent injury from rain. D. J. B. CONDENSED CORRESPONDENCE Statement of Gideon…
United States. Patent Office · Patents · Agriculture
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
