Stereoscopic daguerreotype by Watkins and Hill, c.1855. Stereoscopic daguerreotype by Watkins and Hill 1855
Developing box for Daguerreotype process, with thermometer by Watkins & Hill, 5 Charing Cross, London, c. 1839-40. Developing Box for Daguerreotype process, 1839-1840 1839-1840
Engraved copper plate for printing compass roses on prismatic compass cards, by Watkins and Hill, London, 1840. Engraved copper plate for printing compass roses, by Watkins and Hill 1840
folding achromatic refracting telescope, opera glass type, with leather case, by Watkins and Hill, London, England, c. 1840. folding achromatic refracting telescope 1835-1845
Instrument to demonstrate "Persistence of Vision", by "Watkins and Hill, Charing Cross, London" in leather covered wooden case c. 1820-40 Instrument to demonstrate "Persistence of Vision" 1820-1840
Electrostatic machine, wood frame, glass cylinder, metal fittings, by Watkins and Hill, 5 Charing Cross, London, second half 19th century Electrostatic Machine, 1851-1856 1851-1856
Circular protractor 6-inch, engraved "Watkins and Hill Charing Cross London"; divided in degrees and numbered 0 to 360 degrees; in wood case with inlaid brass plate engraved "H.O. ^ 7" Circular brass protractor, 1818-1856 1818-1856
Protractor, semi-circular, by Watkins and Hill; diameter about 6 1/2", arm projects 6" beyond circle, engraved "Watkins and Hill, Charing Cross, London", "H.O.R." in case 14" x 5 1/4" x 7/8", mahogany Protractor, semi-circular, by Watkins and Hill; diameter about 6 1/2"
Apparatus to show the relative expansion of different liquids, made by Watkins & Hill, 5 Charing Cross, London with 3 sealed glass tubes containing mercury, oil and (coloured) water respectively (A fourth tube is missing) Apparatus to show the relative expansion of different liquids 1828
Aepinas's condenser supplied by Watkins and Hill, Opticians, 5 Charing Cross, London, in 1828 for #5-8-0 Aepinas's condenser supplied by Watkins and Hill 1828