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Letter from Benjamin Hartley about his improvement to Sergeant John Bell's grapple
Letter from Benjamin Hartley about his improvement to Sergeant John Bell's grapple
Letter from Samuel Hart about producing an extract of bark suitable for tanneries
Letter from Samuel Hart about producing an extract of bark suitable for tanneries
Letter from Thomas Hart about his method of holding ships at anchor, with drawing
Letter from Thomas Hart about his method of holding ships at anchor, with drawing
Letter from Harry Hart about cobalt
Letter from Harry Hart about cobalt
Letter from Harry Hart about cobalt
Letter from Harry Hart about cobalt
Letter to Harry Hart from Thomas Maydew & Co about cobalt
Letter to Harry Hart from Thomas Maydew & Co about cobalt
Letter to Harry Hart from Thomas Teague about cobalt
Letter to Harry Hart from Thomas Teague about cobalt
Letter to Harry Hart from James Pennington about cobalt
Letter to Harry Hart from James Pennington about cobalt
Letter William Harrison and others about a plough
Letter William Harrison and others about a plough
Letter from William Harrison about the cultivation of potatoes for feeding cattle and sheep
Letter from William Harrison about the cultivation of potatoes for feeding cattle and sheep
Letter from John Harrison about his improved maps
Letter from John Harrison about his improved maps
Letter from James Harrison about the death of his wife, with an estimate for printing Vol 6 of Transactions
Letter from James Harrison about the death of his wife, with an estimate for printing Vol 6 of Transactions
Letter from Thomas Harris about his hand mill
Letter from Thomas Harris about his hand mill
Letter from Thomas Harris about his hand mill and printed advertisement
Letter from Thomas Harris about his hand mill and printed advertisement
Letter from J Harris about his method of tanning leather
Letter from J Harris about his method of tanning leather
Letter from J Harris about his method of tanning leather
Letter from J Harris about his method of tanning leather
Letter from J Harris about his method of tanning leather
Letter from J Harris about his method of tanning leather
Letter from John Harriott about his improved ships' pumps
Letter from John Harriott about his improved ships' pumps
Letter from John Harriott suggesting the establishment of an agricultural academy
Letter from John Harriott suggesting the establishment of an agricultural academy
Letter from John Harriott about his table for the preservation and improvement of landed estates and the promoting of increasing the growth of timber thereon
Letter from John Harriott about his table for the preservation and improvement of landed estates and the promoting of increasing the growth of timber thereon