‘Visual glasses’ designed by Benjamin Martin
1756-1800
horological gravers
1850-1900
Demainbray's convex lens
1750
Demainbray's turquoise disc
1745-1755
Demainbray's hydrostatic paradox vessels
1735-1752
horological file
1850-1900
Demainbray's polemoscope
1701-1752
Pair of bar magnets in box
1750-1795
Demainbray's yellow disc
1745-1755
Horological gravers with an oval profile
1850-1900
Horological gravers with triangular profile
1850-1900
Gunter quadrant
1650-1725
Cupellation furnace
1696-1700
Pair of seventeenth-century dividers
1600-1699
horological rubber
1850-1900
Demainbray's syphon
1701-1752
Sector by Charles Whitwell
1600-11
Gunter quadrant
1650-1725
Demainbray's speaking trumpet
1700-1752
Brass-bound lodestone
1675-1700
Hindley's pyrometer and three expansion tubes made by Henry Hindley
1752
Dover Castle turret clock
1632-1640
wheel cutting machine
1668-1672 Probable
horological gravers
1850-1900
horological gravers
1850-1900
horological graver
1850-1900
George III's pendulum
1762
King George III's central forces machine
1762
Section of lightning conductor from St Paul’s cathedral
1769
Small orrery by Benjamin Martin
1738-1777
The Improved Pedometer or Waywiser
1765-1806
Etching of an electrically powered garden
1755
Ready reckoner for ship's cargoes
1807
Demainbray's Irish low-backed cart model
1735-1754.
Demainbray's cometarium
1750-1760
Trade card for John Yarwell, optician, London, England, 1697
1697
Glass bell jar with a brass collar
1761
Electrical chimes by George Adams
1781-1790
"The description and use of the Sector, Cross-staff and other Instruments", 2nd edition by Edmund Gunter
1636
Sector signed John Allen
1630-1642
Double brass stand for bell jars on a brass pillar
1761
Stipple-engraved portrait of Benjamin Martin
1815
‘Medico-Electrical Machine’ by Nairne and Blunt
1782-1793
Compendium rule signed Humfrey Cole
1574
Compendium by Elias Allen
1630-1653
Celestial globe by Willem Janszoon Blaeu
1603
Square signed "J.Ramsden, 1757"
1757
100 Link Steel Surveying Chain, 1784.
1784
George III's weighted cylinder
1762
Barnard Tompion clock
1708