Lithograph: "Aloys Senefelder The Inventor of Lithography"
1874
photograph, Microscopes
1876
metal cover for Remington No.1 typewriter
1876
Boxwood fathom marker
1876
Boxwood fathom marker
1876
Electric time piece with hands but without dial
1872
Deep-sea Reversing Mercury Thermometer, 1870-1875
1870-1875
Tourmaline pincers in brass mounts
1872
Nicol prism, in cylindrical brass mount
1870
Copper Cube and Condensing Syringe Apparatus, 1872
1872
Minimum Alcohol Thermometer by Pastorelli & Co., 1875
1875
Six's Self-Registering Maximum and Minimum Mercury Thermometer by Pastorelli & Co., 1875
1875
Portable Six's maximum and minimum self-registering thermometer
1875
Physiological Mercury Thermometer, 1876
1876
Physiological Mercury Thermometer, 1876
1876
Physiological Mercury Thermometer, 1876
1876
Ear Mercury Thermometer, 1876
1876
Copy of Musschenbroek's Pyrometer (Dilatometer), 1700-1731.
1877 (copy); 1700-1731 (original)
Achromatic lens
1870
Combination of 3 prisms to show achromatism
1872
Electrophorus
1872
Astatic galvanometer by Elliott Brothers, 1872.
1872
Rotating spark
1872
Sectioned induction coil
1874
Dipping needle with arc
1872
Helmholtz's quadrant electrometer
1876
Burette with glass stopcock, graduated to 30 cc.
1876
Electro-magnet in mahogany box
1876
Instrument for electrifying syphon recorder ink bottles
1876
Bichromate battery
1876
Copy of Justus von Liebig's Death Mask, 1873
1873 (original); 1990 (copy)
Differential galvanometer
1870-1873
Peebles governor burner 1875
1875
Wood engraving, c. 1870, 13.5" x 9.5" built-up
1870
Sewing machine, head of a treadle, button-hole type
1868
Hyperbolic Paraboloid String Surface Model
1872
Conoid in contact with a hyperbolic paraboloid, surface string model
1872
Map measurer
1876
Map measurer with 10 paper dials
1876
Drawing pen for red ink
1876
Lithographic drawing pen
1876
Hexecontahedron
1876
Double Pyramid
1876
Catalan collection of semi-regular polyhedra
1876
Icottetrahedron
1876
Dodecahedron
1876
Triacontahedron
1876
10-Inch JuniorTrig 0902 Aristo slide rule from the 1974 catalogue
1970-1875
Dual of a Truncated Octahedron
1876
Catalan collection of semi-regular polyhedra
1876