Sector signed John Allen
1630-1642
Pocket microscope by Jeremiah Sisson
1752
Cylinder watch in pinchbeck inner case
Stained plaster phrenological bust
1821
Phrenological head
1821
Surveyor's pocket sextant.
1795-1805
Lovely Llandudno
circa 1910
Improved Patent Portable Theodolite
1818-1826
Patent telemeter, British, 1910-1920
1910-1920
Set of paint brushes & paint, British, 1875-1901
1875-1901
Watkin type clinometer, British, 1895
1895
Steward patent telemeter
1908-1912
Patent prismatic clinometer, British, 1810 -1826
1810-1826
Herbert-Smith type range-finder, British, 1912-1916
1912-1918
Azimuth variation compass, British, 1722-1747
1722-1747
Ear trumpet
1850-1900
Pocket-sized spectroscope, cased, by John Browning
Two coloured aquatints of hobby horses
1819
Transit telescope
1770
Drawing of Gass Works
1812
Richard Hornsby
1858
Hollow square pyramid
1833-1851
Precision Balance, in mahogany and glass case
1788
Mahogany and brass octant.
1770-1776
The Tunnel
1831
Thermometer, glass, Fahrenheit
1801-1900
Car clock
1906
Pocket alarm watch in pinchbeck case
1771-1800
Apothecaries scales with glass pan and steel beam
1880-1940
Hypsometer with carrying case by Elliott Brothers
1831-1870
Disc Planisphere
1750-1775
Matthew Boulton
1812
Case of silver mathematical drawing instruments by C. A. Schmalcalder
1810-1826
Solar microscope with screwbarrel
1750-1775
Coaches &c, Employed on the Railway
1831
Boxfoot botanic microscope by Banks
1790-1810
Amputation saw, London, England, 1823-1829
1823-1829
Set of five suture needles with holder
1830-1889
Brass moving wire filar micrometer by J. Sissons
1740-1760
Lord Kelvin's mirror galvanometer with lamp and stand, 1858.
1858
Double-frame brass sextant.
1810-1826
Wooden backstaff fitted with artificial horizon.
1730-1735
Plaster phrenological bust, London, England, 1821
1821
Britannia Bridge
Abney level & clinometer, English, 1875-1885
1875-1885
Box type pocket sextant.
1845-1855
Cavalry Survey Sketching Board, 1891-1900
1891-1900
'Range' tape measure, British, 1910-1912
1910-1912
Optical square for use with telemeter, British, 1904-1911
1904-1911
Tree height measurer, British, 1945-1948
1945-1948