Apophyllite under polarized light Finish:Single with vessels on the River

with vessels on the River Thames

Found in the Royal Collection

[Remarkable phenomena at and through different prisms to correct Newton's and Goethe's theories of colours] by Johann Friedrich Christian Werneburg (Nuremberg

County of Lincoln

and 12 years old Muriel Blackburn daughter of Mr

Apophyllite under polarized light Finish:Single with vessels on the RiverThree figures showing a variety of the Faroe Islands mineral Apophyllite (named Tesselite by David Brewster) viewed under the microscope. Figure 1 Faroe Apophyllite viewed under polarized light at x50 magnification. Figure 2 Colours produced by Apophyllite 'when crossed by a plate of sulphate of lime, which gives one unified blue tint. Figure 3 Circular system of rings round the axis of 'Apophyllite Surcomposee.' Plate 21 from the paper 'Account of a