Piece of oak, hand mirror shape, piece of iron screwed on circular portion James Watt's Garret Workshop 1790-1819
Brass quadrant by Peter and John Dollond of 18-inch radius with optical sights on a tripod Astronomy 1780-1820
Onelarge jar containing: white powder, piece of paper, “Old plaster mixed with alum water will set” James Watt's Garret Workshop 1790-1819