Norrenberg polariscope with Wheatstone's improvements
1876
Nicol prism, in cylindrical brass mount
1870
Iceland spar
1801-1837
Iceland spar
1876
Petrographical microscope 'Eclipse'
1895-1900
Eleven Nicol prisms from set of 12, in case
1876
Polariscope to show rings in axis-cut crystals
1825-1835
Wheatstone's Polariscope
1833-1867
Large projection polariscope
1875-1880