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Optical Utilities

Nature volume 142, page 609 (01 October 1938) | Download Citation

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Abstract

MESSRS. W. WATSON AND SONS, LTD., 313 High Hol-born, London, W. C. I, have issued a booklet entitled “Optical Utilities”, containing a catalogue of small optical instruments for aiding vision. These include magnifiers mounted as spectacles, the “Speera” for dissecting or viewing minute objects, and the “Spect-opera” for viewing distant scenes, a magnifying glass with electric bulb in the handle for examining maps, prints, etc., a “Strip” magnifier for reading small print, a pocket lens compass, the needle of which is mounted between two lenses so that it can be used as a pocket magnifier, and other useful devices.

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https://doi.org/10.1038/142609b0

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