Phrenological head
1821
Pocket microscope by Jeremiah Sisson
1752
Surveyor's pocket sextant.
1795-1805
Sector signed John Allen
1630-1642
Stained plaster phrenological bust
1821
Cylinder watch in pinchbeck inner case
Thomson mirror speaking galvanometer, 1858
1858
Scale with metal stand for Thompson mirror speaking galvanometer, 1858
1858
Lens for narrowing light beam for Thomson mirror speaking galvanometer, 1858
1858
Lamp cover for Thompson mirror speaking galvanometer, 1858
1858
Altazimuth theodolite, British, 1725-1747
1725-1747
Plaster phrenological bust, London, England, 1821
1821
Lord Kelvin's mirror galvanometer with lamp and stand, 1858.
1858
Improved Patent Portable Theodolite
1818-1826
Pocket-sized spectroscope, cased, by John Browning
Mahogany and brass octant.
1770-1776
Box type pocket sextant.
1845-1855
Tree height measurer, British, 1945-1948
1945-1948
Steward patent telemeter
1908-1912
'Range' tape measure, British, 1910-1912
1910-1912
Azimuth variation compass, British, 1722-1747
1722-1747
Transit telescope
1770
Car clock
1906
Double-frame brass sextant.
1810-1826
Prismatic magnetic compass, British, 1810-1826
1810-1826
Amputation saw, London, England, 1823-1829
1823-1829
Prismatic magnetic compass, British, 1810-1826
1810-1826
Brass quadrant with stand and case.
1771
Case of silver mathematical drawing instruments by C. A. Schmalcalder
1810-1826
Boxfoot botanic microscope by Banks
1790-1810
Box type pocket sextant.
1810-1826
Patent telemeter, British, 1910-1920
1910-1920
Disc Planisphere
1750-1775
Wooden backstaff fitted with artificial horizon.
1730-1735
Watkin type clinometer, British, 1895
1895
Ear trumpet
1850-1900
Precision Balance, in mahogany and glass case
1788
Cavalry Survey Sketching Board, 1891-1900
1891-1900
Herbert-Smith type range-finders, British, 1912-1916
1912-1916
Brass moving wire filar micrometer by J. Sissons
1740-1760
Hollow square pyramid
1833-1851
Solar microscope with screwbarrel
1750-1775
Pocket alarm watch in pinchbeck case
1771-1800
Hypsometer with carrying case by Elliott Brothers
1831-1870
Automatic lancet, London, England, 1822-1863
1822-1863
Apothecaries scales with glass pan and steel beam
1880-1940
Set of five suture needles with holder
1830-1889
Circular watch by William Crayle in the Strand
circa 1660
A pair of instruments
1911
Herbert-Smith type range-finder, British, 1912-1916
1912-1918