Marine Timekeeper known as 'H5' by John Harrison and Son 1770
1770
Napier's Bones
1690
Brunel, Marc Isambard
1769 - 1849
Model of early manual fire engine, ca. 1680.
1680
Small white cup in soft paste porcelain
1748-1763
Expedition Crane
1764
Plane table outfit by Benjamin Cole
1750-1766
Doorcase 56 Lincoln’s Inn Fields
circa 1750
Sector by Bion
1700-1720
Combined graphometer and plummet clinometer, 1663.
1663
Spring-driven Bracket Clock by Isaac Thuret
1665-1670
Astronomical quadrant with stand, 1685-1724
1685-1724
Demainbray's model scorpion catapult
1745-1755
Demainbray's Archimedean screw
1752
Mezzotint portrait of Benjamin Franklin
1762
wheel cutting machine
1668-1672 Probable
Telescope by John Yarwell.
1685-1695
Demainbray's convex lens
1750
Pocket microscope by Jeremiah Sisson
1752
Telescope by Christopher Cock
1673
Mural arc made for King George III
1770
Demainbray's syphon
1701-1752
Gunter quadrant
1650-1725
Pulley from long-case clock by Fromanteel
1660-1665
Gunter quadrant
1650-1725
Etching of an electrically powered garden
1755
Brass-bound lodestone
1675-1700
Escape wheel from long-case clock by Fromanteel
1660-1665
Demainbray's cometarium
1750-1760
Edmund Culpeper
1720
Demainbray's polemoscope
1701-1752
Demainbray's speaking trumpet
1700-1752
Clarke's Hydrometer (c. 1755)
1755
Thomas Tuttell
1695-1702
Barnard Tompion clock
1708
Demainbray's hydrostatic paradox vessels
1735-1752
Demainbray's wharf jib crane model
1729-1753
Demainbray's rat's tail crane model
1735-1753
George III's weighted cylinder
1762
Unweighted cylinder in frame
1762
Section of lightning conductor from St Paul’s cathedral
1769
Demainbray's turquoise disc
1745-1755
Spiral slide-rule
1663
Demainbray's yellow disc
1745-1755
Demainbray's Irish low-backed cart model
1735-1754.
Cupellation furnace
1696-1700
Trade card for John Yarwell, optician, London, England, 1697
1697
Square signed "J.Ramsden, 1757"
1757
Long mahogany strip brass pin gauge with five pins
1758-1769
Short mahogany strip brass pin gauge with eight pins
1758-1769