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Title: Square 'Kryptok' fused slab and segment, medium 'Chlorophyll [Go to resource]
Description: Square 'Kryptok' fused slab and segment, medium 'Chlorophylle' tint with ground edges, stage in making bi-focal spectacle lens. License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: ophthalmic lens Source: Science Museum Identifier: http://collectionsonline.nmsi.ac.uk/grab... Go to resource More Like this...
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