Hansen's Writing Ball, also known as Malling-Hansen Writing Ball
1875-1880
Telechrome tube
1944
Norrenberg polariscope with Wheatstone's improvements
1876
'Wollaston Doublet' pocket microscope
1865-1875
Reading microscope with slide
1880-1885
Petrographical microscope 'Eclipse'
1895-1900
Magnifier, accessory for compound monocular microscope
1845
Accessories for monocular microscope
1845
Wheatstone type photometer, in brass box, six cork discs with silvered beads, 1870
1870
Compound monocular microscope by Powell and Lealand
1845
set of separate parts for moving coil meter
Horizontal microscope by Charles Chevalier
1825-1850