Oersted Compass Needle, 1828
1828
Instrument to demonstrate "Persistence of Vision"
1820-1840
Wooden model of a Harrison's grid-iron pendulum
1829
Dr. Potter's aerometric balance
1850
Steelyard-type pocket chondrometer
1840-1856
Helical coils revolving round a magnet
1822-1856
Sensitive gold-leaf electroscope
1820-1856
Magnets rotating round a current
1822-1856
Two Zamboni piles with spark gap
1820-1856
Pseudoscope, 1845-1855
1845-1855
Pseudoscope, 1850-1860
1850-1860
Solar Microscope, 1616-1856
1818-1856
Wooden model of a mercury compensated pendulum
1829
Parts of apparatus for demonstrating thermoelectricity
1828
Brass disc fitted with glass handle and small brass discharging sphere
1828
Argand Lamp made by Watkins & Hill used by James Joule
1860
Vertical Reciprocating Steam Engine Model
1818-1851
Bell in vacuo demonstration,1820-1856
1820-1856
Magnetic engine
1840-1856
Apparatus used by Wheatstone in his early researches in spectrum analysis
1830-1839
Batteries revolving round the poles of a magnet
1822-1856
Magnet rotating on its own axis
1822-1856
Glass prism in ball and socket joint on stand
1828
Metal hydrometer by Watkins and Hill (Salinometer). 9" long stem engraved Watkins & Hill London
Stereoscopic daguerreotype by Watkins and Hill
1855
Developing Box for Daguerreotype process, 1839-1840
1839-1840
folding achromatic refracting telescope
1835-1845
Balance, 1806-1840
1806-1840
Engraved copper plate for printing compass roses, by Watkins and Hill
1840
Wollaston type camera lucida by Watkins & Hill
1836
Pair of Pulley Blocks
1814-1851
Protractor, semi-circular, by Watkins and Hill; diameter about 6 1/2"
Circular brass protractor, 1818-1856
1818-1856
Apparatus to show the relative expansion of different liquids
1828
Electrostatic Machine, 1851-1856
1851-1856
Folding pocket spyglass
1750-1900
Aepinas's condenser supplied by Watkins and Hill
1828