News | Published:

Optical Utilities

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



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.

About this article

Publication history





    By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.

    Newsletter Get the most important science stories of the day, free in your inbox. Sign up for Nature Briefing